501
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Shaikh R, Linial M, Brown S, Sen A, Eisenman R. Recombinant avian oncoviruses. II. Alterations in the gag proteins and evidence for intragenic recombination. Virology 1979; 92:463-81. [PMID: 218355 DOI: 10.1016/0042-6822(79)90150-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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502
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Sen A, Halverson DO, Rapp UR, Todaro GJ. Sarcoma virus-specific phosphoproteins are packaged in "rescued" type C virions. Virology 1979; 92:245-51. [PMID: 217164 DOI: 10.1016/0042-6822(79)90231-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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503
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Kundu SC, Sen A. Prazosin in refractory hypertension. Indian Heart J 1979; 31:8-12. [PMID: 437820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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504
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505
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Shoyab M, Sen A. A rapid method for the purification of extrachromosomal DNA from eukaryotic cells. J Biol Chem 1978; 253:6654-6. [PMID: 211127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
A simple and efficient procedure to purify the low molecular weight extrachromosomal DNA from eukaryotic cells is described. Gentle lysis of cells with urea and sodium dodecyl sulfate in 0.24 M phosphate buffer (pH 6.8) is followed by the removal of high molecular weight bulk DNA by centrifugation. Protein and RNA are removed from the supernatant by hydroxyapatite chromatography in urea/phosphate buffer. Urea is then removed with 0.15 M phosphate buffer and the extrachromosomal DNA, virtually free from protein and RNA, is finally eluted in 0.5 M phosphate buffer. The procedure allows the recovery of about 99% simian virus 40 (SV40) DNA from infected monkey kidney cells in the extrachromosomal fraction. In normal mouse, monkey, andhuman cells, approximately 1% of total cell DNA appears to be extrachromosomal.
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506
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Bryant ML, Sherr CJ, Sen A, Todaro GJ. Molecular diversity among five different endogenous primate retroviruses. J Virol 1978; 28:300-13. [PMID: 81317 PMCID: PMC354269 DOI: 10.1128/jvi.28.1.300-313.1978] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Genetically transmitted retroviruses of Old and New World monkeys include type C viruses isolated from baboons (M7), macaque (MAC-1), and owl monkeys (OMC-1) and type D viruses from langurs (PO-1-Lu) and squirrel monkeys (SMRV, M534). Each of these isolates is unrelated to the others by nucleic acid hybridization criteria and contains a unique array of virion-associated proteins which can be resolved by agarose gel filtration and polyacrylamide gel electrophoresis under denaturing conditions. The major structural protein of each virus has a distinct primary structure, as determined by two-dimensional tryptic peptide analysis, and is antigenically different from the others. The major virion phosphoproteins of endogenous primate type C viruses (pp15) are also different from those of type D viruses (pp13-pp14). Immunological and structural analyses show that the endogenous langur virus and the horizontally transmitted Mason-Pfizer virus of rhesus monkeys are closely related to one another, consistent with the sequence homology detected in their RNA genomes. Although certain radioimmunoassays detect interspecies antigenic determinants common to either the p30 or gp70 proteins of some of these viruses, no one assay has yet been designed which can detect all groups of endogenous primate retroviridae. The data lead to the conclusion that primates contain a minimum of three different sets of genetically transmitted type C and type D retroviral genes.
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507
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Shoyab M, Sen A. A rapid method for the purification of extrachromosomal DNA from eukaryotic cells. J Biol Chem 1978. [DOI: 10.1016/s0021-9258(17)37965-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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508
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Chakraborty D, Bhattacharyya A, Majumdar K, Chatterjee K, Chatterjee S, Sen A, Chatterjee GC. Studies on L-ascorbic acid metabolism in rats under chronic toxicity due to organophosphorus insecticides: effects of supplementation of L-ascorbic acid in high doses. J Nutr 1978; 108:973-80. [PMID: 650299 DOI: 10.1093/jn/108.6.973] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The effects of chronic administration of two organophosphorus insecticides, parathion and malathion on the growth rate, ascorbic acid metabolism and some other nutritional and physiological parameters in rats were studied. Both parathion and malathion toxicity retarded the growth rate of rats. Inhibition of brain acetylcholinesterase was taken as an index of organophosphorus insecticide toxicity. Haemoglobin concentration of blood and organ weights were not affected under the toxic conditions. Parathion and malathion administration stimulated the activity of L-gulonolactone oxidase along with a simultaneous increase in the tissue storage and urinary excretion of vitamin C. The activities of other enzymes of ascorbic acid metabolism, dehydroascorbatase, uronolactonase, and L-gulonate dehydrogenase and decarboxylase were altered under the experimental conditions. Only minor histological changes of the liver and kidney tissues were noted under parathion and malathion toxicities. Excess intake of vitamin C under the toxic conditions was found to be very effective in counteracting the growth retardation and also the alterations produced by parathion and malathion both at the enzymatic and histological levels.
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509
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Sherwin SA, Rapp UR, Benveniste RE, Sen A, Todaro GJ. Rescue of endogenous 30S retroviral sequences from mouse cells by baboon type C virus. J Virol 1978; 26:257-64. [PMID: 207887 PMCID: PMC354063 DOI: 10.1128/jvi.26.2.257-264.1978] [Citation(s) in RCA: 66] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Mus musculus SC-1 cells were infected with M7 baboon type C virus. The progeny of this infection included viral pseudotypes that contained M7 helper virus and endogenous 30S retrovirus-associated sequences derived from SC-1 cells (RAS). The RAS sequences are unrelated by nucleic acid hybridization criteria to previously described types of murine retroviruses and do not code for known murine viral structural proteins. The RAS genome is present in multiple copies in the DNA of laboratory (M. musculus) and Asian (M. caroli and M. cervicolor) mice, is expressed in the RNA of uninfected mouse cells, and can be efficiently rescued by type C, but not type B, viruses. RAS is closely related to 30S virus-associated RNA in NIH/3T3 and BALB/c JLSV-9 cells and may be analogous to the defective 30S RNA sequences found in rats.
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510
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Sen A, Todaro GJ. Species-specific cellular DNA-binding proteins expressed in mouse cells transformed by chemical carcinogens. Proc Natl Acad Sci U S A 1978; 75:1647-51. [PMID: 205864 PMCID: PMC392395 DOI: 10.1073/pnas.75.4.1647] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Mouse cells transformed by DNA and RNA tumor viruses and by chemical carcinogens have been examined for the presence of specific DNA-binding proteins by DNA-cellulose chromatography. Using mouse DNA-cellulose we have obtained single-stranded DNA-binding proteins from two clones transformed by chemical carcinogens. Simian virus 40 transformants also have a DNA-binding protein [the tumor (T) antigen] that binds to mouse and human DNA with comparable affinity. Mouse sarcoma virus-transformed cells and two other chemically transformed clones showed no difference in DNA-binding protein pattern compared to the untransformed parental cell. The DNA-binding proteins isolated from the chemically transformed cell clones are between 25,000 and 30,000 daltons by sodium dodecyl sulfate/polyacrylamide gel electrophoresis. These cellular "T proteins" bind to the homologous mouse cellular DNA with a higher affinity than to heterologous human cellular DNA.
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511
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Sherr CJ, Sen A, Todaro GJ, Sliski A, Essex M. Pseudotypes of feline sarcoma virus contain an 85,000-dalton protein with feline oncornavirus-associated cell membrane antigen (FOCMA) activity. Proc Natl Acad Sci U S A 1978; 75:1505-9. [PMID: 206902 PMCID: PMC411501 DOI: 10.1073/pnas.75.3.1505] [Citation(s) in RCA: 58] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Feline sarcoma virus (FeSV) rescued from transformed nonproducer mink or rat cells contains two FeSV-specific antigens (p15 and p12), and the feline oncornavirus-associated cell membrane antigen (FOCMA). All three antigens are helper virus-independent and are encoded by the FeSV genome, FOCMA, p15, and p12 antigens cochromatograph as phosphorylated molecules of 85,000 molecular weight (pp85), adsorb to immunoadsorbant columns prepared with antibodies to feline leukemia virus (FeLV), and are precipitated with antisera to FeLV or FOCMA. Antibodies to FOCMA can be adsorbed with fractions containing pp85 but not with FeLV proteins, including p15 and p12. Thus, a virus-coded tumor antigen which immunizes cats against tumors induced by feline type C viruses is packaged in FeSV particles and is linked to viral structural protein.
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512
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Todaro GJ, Sherr CJ, Sen A, King N, Daniel MD, Fleckenstein B. Endogenous New World primate type C viruses isolated from owl monkey (Aotus trivirgatus) kidney cell line. Proc Natl Acad Sci U S A 1978; 75:1004-8. [PMID: 76312 PMCID: PMC411388 DOI: 10.1073/pnas.75.2.1004] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
A type C virus (OMC-1) detected in a culture of owl monkey kidney cells resembled typical type C viruses morphologically, but was slightly larger than previously characterized mammalian type C viruses. OMC-1 can be transmitted to bat lung cells and cat embryo fibroblasts. The virions band at a density of 1.16 g/ml in isopycnic sucrose density gradients and contain reverse transcriptase and a 60-65S RNA genome composed of approximately 32S subunits. The reverse transcriptase is immunologically and biochemically distinct from the polymerases of othe retroviruses. Radioimmunoassays directed to the interspecies antigenic determinants of the major structure proteins of other type C viruses do not detect a related antigen in OMC-1. Nucleic acid hybridization experiments using labeled viral genomic RNA or proviral cDNA transcripts to normal cellular DNA of different species show that OMC-1 is an endogenous virus with multiple virogene copies (20-50 per haploid genome) present in normal owl monkey cells and is distinct from previously isolated type C and D viruses. Sequences related to the OMC-1 genome can be detected in other New World monkeys. Thus, similar to the Old World primates (e.g., baboons as a prototype), the New World monkeys contain endogenous type C viral genes that appear to have been transmitted in the primate germ line.
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513
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Sen A, Sherr CJ, Todaro GJ. Endogenous feline (RD-114) and baboon type C viruses have related specific RNA-binding proteins and genome binding sites. Virology 1978; 84:99-107. [PMID: 202083 DOI: 10.1016/0042-6822(78)90221-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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514
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Jauhri KS, Kumari ML, Sen A. Production of protein by fungi from agricultural wastes. I. Standardization of certain factors for maximum protein production. ZENTRALBLATT FUR BAKTERIOLOGIE, PARASITENKUNDE, INFEKTIONSKRANKHEITEN UND HYGIENE. ZWEITE NATURWISSENSCHAFTLICHE ABTEILUNG: MIKROBIOLOGIE DER LANDWIRTSCHAFT DER TECHNOLOGIE UND DES UMWELTSCHUTZES 1978; 133:588-96. [PMID: 34947 DOI: 10.1016/s0323-6056(78)80058-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Several fungi were screened for protein production in a simple medium using either sugarcane bagasse, wheat straw or cowdung as substrate. Out of them Rhizoctonia melongina, Pleurotus ostreatus, and Coprinus aratus proved promising and were taken up for further studies. Optimum conditions of temperature, incubation, and pH for maximum growth and protein production by the three fungi were then ascertained and standardized.
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515
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Jollès J, Sen A, Prager EM, Jollès P. Structural data concerning reptilian (tortoise) egg lysozyme. J Mol Evol 1977; 10:261-4. [PMID: 599576 DOI: 10.1007/bf01764601] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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516
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Sen A, Larson D, Todaro GJ. Binding sites for type C viral phosphoprotein on the viral RNA genome. Biochem Biophys Res Commun 1977; 79:518-24. [PMID: 588284 DOI: 10.1016/0006-291x(77)90188-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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517
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Kundu SC, Majumdar S, Sen A, Roy A, Bhattacherjee TD. Oesophageal electrocardiograph in true posterior myocardial infarction. Indian Heart J 1977; 29:320-4. [PMID: 612522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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518
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Gayen SK, Som S, Sinha NK, Sen A. Lysozyme in egg whites of tortoises and turtle. Purification and properties of egg white lysozyme of Trionyx gangeticus Cuvier. Arch Biochem Biophys 1977; 183:432-42. [PMID: 21616 DOI: 10.1016/0003-9861(77)90378-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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519
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Kumar V, Damle V, Rao BS, Sen A, Kumar L. Gaps in the understanding of parents about preventive aspects of diseases and promotional aspects of health hospitalised children. Indian Pediatr 1977; 14:433-8. [PMID: 604270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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520
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Sen A, Sherr CJ, Todaro GJ. Phosphorylation of murine type C viral p12 proteins regulates their extent of binding to the homologous viral RNA. Cell 1977; 10:489-96. [PMID: 844104 DOI: 10.1016/0092-8674(77)90036-8] [Citation(s) in RCA: 39] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The purified p12 phosphoprotein of Rauscher murine leukemia virus was fractionated by ion exchange chromatography into subpopulations of molecules containing different amounts of covalently linked phosphate. Of the various phosphorylated forms of p12 protein purified from virions, only a species containing relatively little phosphate can bind in vitro to purified homologous 70S viral RNA. Using ultraviolet irradiation to stabilize ribonucleoprotein complexes in intact virions, the same molecular species of p12 phosphoprotein can be isolated in close association with the 70S viral genome. The results show that phosphorylation of type C viral p12 proteins influences the extent, but not the specificity, of their interaction with homologous viral RNA.
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521
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Balasundaram VR, Sen A. Stepwise selection of efficient rhizobial cultures through cultural characteristics. ZENTRALBLATT FUR BAKTERIOLOGIE, PARASITENKUNDE, INFEKTIONSKRANKHEITEN UND HYGIENE. ZWEITE NATURWISSENSCHAFTLICHE ABT.: ALLGEMEINE, LANDWIRTSCHAFTLICHE UND TECHNISCHE MIKROBIOLOGIE 1977; 132:623-7. [PMID: 565117 DOI: 10.1016/s0044-4057(77)80043-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Nodulation and shoot nitrogen of two varieties of soybean (Glycine max) were studied with twenty strains of Rhizobium japonicum. A number of cultural characteristics of the strains in isolation to the symbiotic system were also studied. A stepwise selection method was employed for detecting efficient cultures through the cultural characteristics which showed association with the steps in the symbiotic system. Nodulation of one variety was found to be associated with the dehydrogenase activity and the growth of microbes in the medium containing soil extract, whereas the nodulation of another variety showed association with the growth in the media containing asparagine and tryptophane. The shoot nitrogen of one nodulated cultivar correlated with the microbial growth in Elkan's medium in the medium containing serine and glucose, whereas the shoot nitrogen of the other nodulating variety correlated with the growth of the cultures in the medium containing aspartic acid. The validity of this approach to the problem for detecting efficient strains through cultural characteristics was discussed.
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522
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Sen A, Todaro GJ. The genome-associated, specific RNA binding proteins of avian and mammalian type C viruses. Cell 1977; 10:91-9. [PMID: 189935 DOI: 10.1016/0092-8674(77)90143-x] [Citation(s) in RCA: 91] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A structural protein purified from the Rous sarcoma virus (RSV) can specificially bind in vitro to purified avian, but not mammalian, type C viral RNA. Following ultraviolet irradiation of viral particles under conditions which stabilize the polyploid 70S viral RNA, the same polypeptide can be directly purified from the RSV genome. Based on its electrophoretic mobility in polyacrylamide gels containing sodium dodecylsulfate, the RNA binding protein has been identified as the major phosphoprotein (p19) of avian type C viruses. Similar experiments show that the major phosphoproteins of mammalian type C viruses (p12 for murine viruses and p16 for endogenous primate viruses) are also the specific RNA binding proteins and, similarly, are found closely associated with the 70S RNA genomes in the intact viral particles.
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523
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Balasundaram VR, Sen A. Grouping of rhizobial strains--a method based on symbiotic characteristics. ZENTRALBLATT FUR BAKTERIOLOGIE, PARASITENKUNDE, INFEKTIONSKRANKHEITEN UND HYGIENE. ZWEITE NATURWISSENSCHAFTLICHE ABT.: ALLGEMEINE, LANDWIRTSCHAFTLICHE UND TECHNISCHE MIKROBIOLOGIE 1977; 132:616-22. [PMID: 565116 DOI: 10.1016/s0044-4057(77)80042-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Twenty strains of Rhizobium japonicum and non-inoculated control were used to study seven symbiotic characteristics with two varieties of soybean (Glycine max). The strains were then grouped on the basis of these symbiotic characteristics, using Mahalanobis' D2 statistical method. Eight groups were formed in which two strains stood distinctly aloof, indicating thereby the exceptional nature of these strains over others in their symbiotic behaviour. This method is suggested for selecting exceptional strains for particular symbiotic characteristics as well as for greater N fixing efficiency with varieties and for different agroclimatic conditions.
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524
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Kundu SC, Majumdar S, Bhattacherjee TD, De TK, Sen A, Mookerjea PK. A profile of sick sinus syndrome. Indian Heart J 1976; 28:223-9. [PMID: 1022668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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525
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Sen A, Todaro GJ. Specificity of in vitro binding of primate Type C viral RNA and the homologous viral p12 core protein. Science 1976; 193:326-8. [PMID: 180601 DOI: 10.1126/science.180601] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The binding of type C viral p12 proteins to purified viral RNA has been examined in vitro with the use of a family of closely related infectious primate type C viruses--the woolly monkey (SSAV) and gibbon (GALV) group. This in vitro protein-RNA binding is type specific. The system should serve as a model for studies of the evolution of nucleic acid binding proteins.
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526
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Roy J, Som S, Sen A. Isolation, purification, and some properties of a lectin and abrin from Abrus precatorius linn. Arch Biochem Biophys 1976; 174:359-61. [PMID: 7206 DOI: 10.1016/0003-9861(76)90357-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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527
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Abstract
The major viral phosphoproteins (p12) of the Rauscher murine leukemia virus (R-MuLV) and the simian sarcoma-associated virus (SSAV) bind in vitro to their homologous 70S and 35S viral RNAs. Using purified 32P-labeled RNA and 125I-labeled p12 protein, complexes that are stabilized by formaldehyde-cross-linking can be readily detected after velocity gradient centrifugation. The in vitro reconstructed ribonucleoprotein complexes are seen only with p12 proteins incubated with viral RNAs isolated from the same type C viruses; no such complexes form with heterologous protein-RNA mixtures. Homologous but not heterologous p12 molecules compete with radiolabeled p12 protein for the specific viral RNA binding sites. The competition assay permits the detection of 10 ng of viral p12 protein. The major internal protein of type C viruses (p30) does not bind to viral RNA using identical assay conditions. From the specific activities of the radiolabeled components and also by equilibrium sedimentation analysis, we estimate that fewer than 15 molecules of p12 protein bind to each molecule of viral RNA. Both the specificity and stoichiometry of the p12-RNA interactions suggest that these RNA tumor virus proteins have a regulatory role in cells.
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528
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Laipis PJ, Sen A, Levine AJ, Mulder C. DNA replication in SV40 infected cells X. The structure of the 16 S gap circle intermediate in SV40 DNA synthesis. Virology 1975; 68:115-23. [PMID: 171842 DOI: 10.1016/0042-6822(75)90153-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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529
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Sen A, Sinha NK, Wright JD. On-line identification of the parameters of a dual-input heat-exchanger system. CAN J CHEM ENG 1974. [DOI: 10.1002/cjce.5450520526] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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530
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Sen A, Hancock R, Levine AJ. The properties and origin of the proteins in the SV40 nucleoprotein complex. Virology 1974; 61:11-21. [PMID: 4370492 DOI: 10.1016/0042-6822(74)90237-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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531
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Sen A, Levine AJ. SV40 nucleoprotein complex activity unwinds superhelical turns in SV40 DNA. Nature 1974; 249:343-4. [PMID: 4366777 DOI: 10.1038/249343a0] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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532
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Iswaran V, Sen A. Some studies on the groundnut Rhizobium symbiosis. ZENTRALBLATT FUR BAKTERIOLOGIE, PARASITENKUNDE, INFEKTIONSKRANKHEITEN UND HYGIENE. ZWEITE NATURWISSENSCHAFTLICHE ABT.: ALLGEMEINE, LANDWIRTSCHAFTLICHE UND TECHNISCHE MIKROBIOLOGIE 1974; 129:477-80. [PMID: 4480493 DOI: 10.1016/s0044-4057(74)80010-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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533
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Pillai RN, Sen A. Salt tolerance of Rhizobium from Dolichos lablab. ZENTRALBLATT FUR BAKTERIOLOGIE, PARASITENKUNDE, INFEKTIONSKRANKHEITEN UND HYGIENE. ZWEITE NATURWISSENSCHAFTLICHE ABT.: ALLGEMEINE, LANDWIRTSCHAFTLICHE UND TECHNISCHE MIKROBIOLOGIE 1973; 128:538-42. [PMID: 4801560 DOI: 10.1016/s0044-4057(73)80075-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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534
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Iswaran V, Sen A, Apte R. A simple medium for quick growth of Rhizobium japonicum. ZENTRALBLATT FUR BAKTERIOLOGIE, PARASITENKUNDE, INFEKTIONSKRANKHEITEN UND HYGIENE. ZWEITE NATURWISSENSCHAFTLICHE ABT.: ALLGEMEINE, LANDWIRTSCHAFTLICHE UND TECHNISCHE MIKROBIOLOGIE 1973; 128:23-4. [PMID: 4580100 DOI: 10.1016/s0044-4057(73)80034-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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535
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James E, Shende ST, Sen A. [Salt tolerance of Azotobacter chroococcum strains from the rhizosphere of agricultural crops]. MIKROBIOLOGIIA 1972; 41:374-5. [PMID: 5043519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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536
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Ghosh SK, Chaudhuri S, Roy J, Sinha NK, Sen A. Physicochemical investigations on buffalo -lactoglobulin. Studies on sedimentation, diffusion, and hydrogen ion titration. Arch Biochem Biophys 1971; 144:6-15. [PMID: 5117539 DOI: 10.1016/0003-9861(71)90450-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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537
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Sen A, Roman I. EEG and the mobility of attention in a group of adolescents with behavioral disturbances. ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY 1971; 30:364. [PMID: 4103537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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538
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539
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Aschaffenburg R, Sen A, Thompson MP. The caseins of buffalo milk. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY 1968; 27:621-3. [PMID: 5758390 DOI: 10.1016/0010-406x(68)90262-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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540
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Gupta KG, Sen A. Efficiency of isolates of Rhizobium leguminosarum (pea) in relation to their dimensions. Folia Microbiol (Praha) 1968; 13:501-4. [PMID: 5721250 DOI: 10.1007/bf02874221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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541
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Sen A, Clarke AM. The effect of distraction during and after learning a serial recall task. AMERICAN JOURNAL OF MENTAL DEFICIENCY 1968; 73:46-9. [PMID: 5673504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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542
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Ghose AC, Chaudhuri S, Sen A. Hydrogen ion equilibria and sedimentation behavior of goat beta-lactoglobulin. Comparison of goat and bovine beta-lactoglobulins. Arch Biochem Biophys 1968; 126:232-43. [PMID: 5671066 DOI: 10.1016/0003-9861(68)90579-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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543
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Sen A, Clarke AM. Some factors affecting distractibility in the mental retardate. AMERICAN JOURNAL OF MENTAL DEFICIENCY 1968; 73:50-60. [PMID: 5673505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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544
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Aschaffenburg R, Sen A, Thompson MP. Genetic variants of casein in Indian and African Zebu cattle. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY 1968; 25:177-84. [PMID: 5657194 DOI: 10.1016/0010-406x(68)90924-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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545
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Sen AK, Sen A. A test of the McCrary-Hunter hypothesis in mentally retarded subjects. JOURNAL OF MENTAL DEFICIENCY RESEARCH 1968; 12:36-46. [PMID: 5663931 DOI: 10.1111/j.1365-2788.1968.tb00240.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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546
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Sen AK, Sen A. A study of trace inaccessibility among severely subnormal adults. JOURNAL OF MENTAL DEFICIENCY RESEARCH 1967; 11:31-35. [PMID: 6034524 DOI: 10.1111/j.1365-2788.1967.tb00200.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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547
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Sen A, Roy D, Bhattacharya S, Deb NC. Hemoglobins of Indian Zebu Cattle and the Indian Buffalo1. J Anim Sci 1966. [DOI: 10.2527/jas1966.252445x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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548
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Abstract
This experiment studies the influence of set on the two-point tactual threshold. The two-point limen (critical stimulus) was determined along the mid-longitudinal line of both volar and dorsal surfaces of the right forearms of seven university students. Test-stimuli were selected at 3 mm. steps both up and down from each of the critical stimuli. Each of these test-stimuli was presented separately, the critical stimulus being interpolated 30 times in each test of the series. The proportions of two-point and one-point responses to the critical stimulus were then determined again in a control series. It was found that, as the test-stimulus deviated in the positive direction from the critical stimulus, the proportion of two-point responses to the critical stimulus increased, reached a maximum and then began to decline. A similar rise and fall in one-point responses were found in the opposite direction. The results were explained by Adaptation Level Theory.
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549
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Greval SDS, Sen A. Latent Syphilis and False-Positive Wassermann Reaction in the Tropics. THE INDIAN MEDICAL GAZETTE 1942; 77:211-214. [PMID: 29012406 PMCID: PMC5168937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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550
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Sen A, Laipis PJ, Levine AJ. DNA replication in SV40-infected cells. XI. The properties of SV40 DNA and nucleoprotein complex synthesized in the presence of cycloheximide. Intervirology 1975; 5:122-36. [PMID: 172469 DOI: 10.1159/000149890] [Citation(s) in RCA: 1] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Cycloheximide inhibits simian virus 40 (SV40) DNA synthesis in productively infected African green monkey kidney cells. The residual viral DNA synthesized in the presence of this drug is deficient in superhelical turns as measured by band sedimentation in the presence of several concentrations of ethidium bromide. The superhelical density of SV40 DNA synthesized in the presence of cycloheximide is about one half that of viral DNA produced in the absence of this drug. Ribonuclease H and alkali treatment were employed to determine if ribonucleotides could be detected in closed circular SV40 DNA synthesized in the presence of cycloheximide. While both these approaches detected ribonucleotides in mitochondrial DNA, no identification of ribonucleotides in SV40 DNA synthesized in the presence of cycloheximide was found. The SV40 nucleoprotein complex synthesized in the presence of cycloheximide has a slower sedimentation rate (35S) and a higher bouyant density (1.54 g/cm3) than the complex made in the absence of this drug (50S; 1.47 g/cm3). The protein:DNA ratio of the SV40 nucleoprotein complex is normally about 0.9. This ratio is reduced to about 0.6 when the complex is synthesized in the presence of cycloheximide.
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