9276
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Li Y. [Blocking effect of sea buckthorn juice on the nitrosation of morpholine in vitro]. ZHONGHUA YU FANG YI XUE ZA ZHI [CHINESE JOURNAL OF PREVENTIVE MEDICINE] 1987; 21:199-201. [PMID: 3652867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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9277
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Liou GI, Fong SL, Gosden J, van Tuinen P, Ledbetter DH, Christie S, Rout D, Bhattacharya S, Cook RG, Li Y. Human interstitial retinol-binding protein (IRBP): cloning, partial sequence, and chromosomal localization. SOMATIC CELL AND MOLECULAR GENETICS 1987; 13:315-23. [PMID: 3455009 DOI: 10.1007/bf01534925] [Citation(s) in RCA: 35] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A cloned 2184-bp cDNA coding for human interstitial retinol-binding protein (IRBP) has been isolated and sequenced. The probe hybridized to a 5.2-kb poly(A) RNA from human retinas. Nineteen tryptic peptides (363 amino acids) sequenced and purified from bovine IRBP could be aligned with 86-88% homology to the translated sequence. Two segments approximately 200 amino acids long were found to have a 41% residue identity, suggesting an internal duplication event. This cloned cDNA was used to probe DNA samples from a panel of 29 rodent-human somatic cell hybrids, mapping the structural gene for IRBP to chromosome 10. In situ hybridization suggested a regional localization near the centromere (p11.2----q11.2), although a secondary site of hybridization at q24----25 was also observed.
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9278
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Zehner ZE, Li Y, Roe BA, Paterson BM, Sax CM. The chicken vimentin gene. Nucleotide sequence, regulatory elements, and comparison to the hamster gene. J Biol Chem 1987; 262:8112-20. [PMID: 3036797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Here we report the nucleotide sequence of the chicken vimentin gene and its deduced primary amino acid sequence. A comparison of this gene to other intermediate filament protein genes demonstrates that both exon size and position are strongly conserved features of this multigene family. In addition, the hamster and chicken vimentin genes exhibit strong identity at the level of nucleotide (74%) and amino acid (80%) sequence. Interestingly, 40% of total sequence diversity is localized to the N terminus or "head" region of these genes whereas other protein domains (rod and C terminus) are remarkably identical in both nucleotide (81%) and amino acid (89%) sequence. Even stronger amino acid identity (100%) is exhibited in certain subdomains which may define regions crucial for filament formation and function. Not surprisingly, vimentin is more homologous across animal species than it is to other intermediate filament protein members (e.g. desmin) within the same species. A comparison of 5'-flanking sequences of the hamster and chicken genes as well as other characterized promoter elements (SV40, HSV-TK) reveals homologous sequence elements which may define common and/or unique sites involved in the modulation of gene expression. The implications of these sequence elements for both tissue-specific and developmental expression of the vimentin gene are discussed.
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9279
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Li Y, Eichmann G. Conditional symbolic modified signed-digit arithmetic using optical content-addressable memory logic elements. APPLIED OPTICS 1987; 26:2328-2333. [PMID: 20489871 DOI: 10.1364/ao.26.002328] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A new conditional symbolic substitution rule for modified signed-digit arithmetic computation is introduced. Using this substitution rule, the numbers to be added or subtracted are first replaced by a pair of new equivalent strings, which in a second step are then subject to another substitution to generate both the addition or subtraction result and its complement. For an optical implementation, a holographic contentaddressable memory is used. Correspondingly, the input encoding, the logic reduction, and the optical processing techniques are described.
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9280
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Zehner ZE, Li Y, Roe BA, Paterson BM, Sax CM. The chicken vimentin gene. Nucleotide sequence, regulatory elements, and comparison to the hamster gene. J Biol Chem 1987. [DOI: 10.1016/s0021-9258(18)47536-9] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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9281
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Pu QL, Li Y, Yang J, Yan SY. [Study on mass spectra of alkaloids from Sophora alopecuroides L]. YAO XUE XUE BAO = ACTA PHARMACEUTICA SINICA 1987; 22:438-44. [PMID: 3450141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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9282
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Li Y, Zhang TM. [Effect of oridonin on metabolism of thymine nucleotides in tumor cells in mice]. ZHONGGUO YAO LI XUE BAO = ACTA PHARMACOLOGICA SINICA 1987; 8:271-4. [PMID: 2959027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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9283
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Li JN, Li Y, Chan JB. [A study of 217 cases of IGA nephropathy]. ZHONGHUA NEI KE ZA ZHI 1987; 26:266-8, 317-8. [PMID: 3652831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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9284
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Liou GI, Li Y, Wang C, Fong SL, Bhattacharya S, Bridges CD. Bgl II RFLP recognized by a human IRBP cDNA localized to chromosome 10. Nucleic Acids Res 1987; 15:3196. [PMID: 2882488 PMCID: PMC340936 DOI: 10.1093/nar/15.7.3196] [Citation(s) in RCA: 35] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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9285
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Eichmann G, Li Y. Compact optical generalized perfect shuffle. APPLIED OPTICS 1987; 26:168335. [PMID: 20454285 DOI: 10.1364/ao.26.1167_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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9286
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Li Y, Zhang B, Christen AG. The historical development of dentistry in China. BULLETIN OF THE HISTORY OF DENTISTRY 1987; 35:21-8. [PMID: 3552087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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9287
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Li Y, Dunipace AJ, Stookey GK. Absence of mutagenic and antimutagenic activities of fluoride in Ames salmonella assays. Mutat Res 1987; 190:229-36. [PMID: 3550448 DOI: 10.1016/0165-7992(87)90001-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The mutagenicity of fluoride (as sodium fluoride, NaF) was investigated with Ames Salmonella/microsome assays in strains of TA97a, TA98, TA100, TA102 and TA1535. The concentrations of NaF tested ranged from 0.44 to 4421 micrograms/plate (0.1 to 1000 ppm F), both with and without microsome activation. In addition, the suggested antimutagenic effect of fluoride was evaluated with known mutagens at various concentrations of NaF (0.44-442.2 micrograms/plate, 0.1-100 ppm F). The data showed that NaF, in amounts from 0.44 to 442.2 micrograms/plate (0.1-100 ppm F), failed to significantly increase the number of the revertants over the number observed in the solvent (distilled deionized water) controls. Increases of NaF to, and beyond, 1100 micrograms/plate (250 ppm F) resulted in a toxic effect and a reduction of the revertants to various degrees among the strains. NaF in the presence of known mutagens did not significantly decrease the number of the revertants. The results of this study indicate that NaF does not have mutagenic or antimutagenic effects in the strains tested with Ames Salmonella assays.
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9288
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Li Y, Golemis E, Hartley JW, Hopkins N. Disease specificity of nondefective Friend and Moloney murine leukemia viruses is controlled by a small number of nucleotides. J Virol 1987; 61:693-700. [PMID: 3468264 PMCID: PMC254008 DOI: 10.1128/jvi.61.3.693-700.1987] [Citation(s) in RCA: 145] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Moloney murine leukemia virus induces T cell lymphomas after injection into NFS mice, whereas the nondefective Friend virus induces erythroleukemias. Previous studies showed that sequences encompassing the viral transcriptional signals in U3 are the primary determinant of this phenotype in recombinants between these two viruses. To more precisely identify the sequences responsible, we constructed additional recombinants, within U3, between Friend and Moloney viruses and assayed these recombinants for for their disease specificity. We found that a fragment 191 bases long that included the direct repeat (enhancer) region plus 22 nucleotides to its 3' side from Friend virus was sufficient to convert Moloney virus to a virus that induced only erythroleukemias. A 171-base-long fragment of Moloney virus, including just the direct repeat, converted Friend virus to a virus that induced primarily lymphomas (about 85% of mice injected). We also constructed Moloney and Friend virus variants with one rather than two copies of the enhancer element. These viruses retained their disease specificity, although they exhibited a marked increase in the latent period of disease induction. Together the results suggest that 25 or fewer nucleotide differences, lying within and also just 3' of the direct repeat, are the primary determinant of the distinct disease specificities of nondefective Friend and Moloney viruses.
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9289
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Li Y, Naqui A, Frey TG, Chance B. A new procedure for the purification of monodisperse highly active cytochrome c oxidase from bovine heart. Biochem J 1987; 242:417-23. [PMID: 3036090 PMCID: PMC1147721 DOI: 10.1042/bj2420417] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A simple and rapid method for the isolation of a large quantity of cytochrome c oxidase from bovine heart mitochondria was developed, based on selective solubilization of mitochondrial protein with first Triton and then lauryl maltoside. Gel filtration shows that the lauryl maltoside-solubilized oxidase preparation is in a hydrodynamically homogeneous state with a Stokes radius of 7.5 +/- 0.2 nm. It contains 8.0 mumol of haem (with an a/a3 ratio of 1)/g of protein. The catalytic constant (maximum turnover number) with respect to cytochrome c approaches 600 S-1. After further purification of the solubilized enzyme on a sucrose-gradient centrifugation, the purified enzyme has a haem content of 10.3 mumol/g of protein and eight major polypeptide bands shown on SDS/polyacrylamide-gel electrophoresis.
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9290
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Eichmann G, Li Y, Alfano RR. Parallel optical logic using optical conjugation. APPLIED OPTICS 1987; 26:194-196. [PMID: 20454101 DOI: 10.1364/ao.26.000194] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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9291
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Wei JY, Li Y, Ragland J. Effect of exercise training on resting blood pressure and heart rate in adult and aged rats. JOURNAL OF GERONTOLOGY 1987; 42:11-6. [PMID: 3794189 DOI: 10.1093/geronj/42.1.11] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
To test the hypothesis that advancing age may have an effect on cardiovascular adaptation (resting blood pressure and heart rate) in response to exercise training, we compared adult (4.5 months at start of training) and aged (21.5 months at start of training) male Fischer 344 rats exercised on a rodent treadmill 5 days/week for 9 weeks. Two additional age-matched control groups were similarly handled and placed on the nonmoving treadmill for the same duration. Chronic exercise did not alter blood pressure in the adult group but lowered resting blood pressure in the aged rats during the midportion of the training period. On the other hand, the adult group demonstrated a significant decrease in the resting heart rate from Weeks 3 through 7 during training, whereas the aged group showed no change in resting heart rate during the entire study. These findings suggest that there may exist an age-related difference in the effect of exercise training on basal cardiovascular homeostasis, which is cardioinhibitory in the adult and vasodepressant in the aged.
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9292
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Yan YZ, Chen XY, Zeng WD, Zhang H, Li Y. [Study on the antiinflammatory effect of "dan-shen injection"]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1986; 8:417-9. [PMID: 2954668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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9293
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Li Y, Chen YX, Yu PL, Ji RY. [Studies on analogs of qinghaosu. VI. Synthesis of dihydroartemisic acid from the degradation product of qinghaosu-diketone]. YAO XUE XUE BAO = ACTA PHARMACEUTICA SINICA 1986; 21:899-905. [PMID: 3591329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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9294
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Huang GQ, Li Y, Liu YH, Song Y, Xiao YK, Cao JX, Jiang JQ, Hu LF, Sun DT, Yao J. [A study on nucleic acid hybridization of human nasopharyngeal carcinoma with EBV-W fragment probe]. HUA XI YI KE DA XUE XUE BAO = JOURNAL OF WEST CHINA UNIVERSITY OF MEDICAL SCIENCES = HUAXI YIKE DAXUE XUEBAO 1986; 17:269-72. [PMID: 3032764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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9295
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Ernst N, Drachsel W, Li Y, Block JH, Kreuzer HJ. Field adsorption of helium on tungsten. PHYSICAL REVIEW LETTERS 1986; 57:2686-2689. [PMID: 10033835 DOI: 10.1103/physrevlett.57.2686] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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9296
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Li Y, Eichmann G. Multipass counterrotating wave-plate frequency shifters for heterodyne interferometry. OPTICS LETTERS 1986; 11:718-720. [PMID: 19738738 DOI: 10.1364/ol.11.000718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A multipass counterrotating wave-plate frequency shifter for heterodyne interferometry is proposed. By using this method, with a fixed optical system, it is possible to generate wide, tunable-frequency-shifted signals.
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9297
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Li Y, Erskine JL, Diebold AC. High-resolution electron-energy-loss spectroscopy of hydrogen chemisorption at Nb(100) surfaces: Evidence for subsurface absorption sites. PHYSICAL REVIEW. B, CONDENSED MATTER 1986; 34:5951-5954. [PMID: 9940450 DOI: 10.1103/physrevb.34.5951] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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9298
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Eichmann G, Li Y, Alfano RR. Optical binary coded ternary arithmetic and logic. APPLIED OPTICS 1986; 25:3113. [PMID: 18235585 DOI: 10.1364/ao.25.003113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
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9299
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Li Y, Eichmann G, Alfano RR. Optical computing using hybrid encoded shadow casting. APPLIED OPTICS 1986; 25:2636-2638. [PMID: 20453979 DOI: 10.1364/ao.25.002636] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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9300
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Li Y, Lincoln T, Mendelowitz D, Grossman W, Wei JY. Age-related differences in effect of exercise training on cardiac muscle function in rats. THE AMERICAN JOURNAL OF PHYSIOLOGY 1986; 251:H12-8. [PMID: 3728687 DOI: 10.1152/ajpheart.1986.251.1.h12] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
To test the hypothesis that age may alter the effect of exercise training on myocardial function, we trained young adult (4-5 mo at study initiation) and old (21 mo at initiation) male Fischer 344 rats to run on a rodent treadmill 5 days/wk for 4.5 mo and compared their myocardial function with that of age-matched sedentary controls. Right ventricular papillary muscles were isolated from the young adult and aged animals and stimulated at the length at which developed isometric tension was maximal to contract isometrically at 12/min, bathed in oxygenated modified Krebs solution, and studied at 28 degrees, 32 degrees, 35 degrees, and 38 degrees C. In the absence of cardiac hypertrophy, exercise training significantly reversed the age-related prolongation of isometric contraction duration in the senescent rat (P less than 0.001). However, exercise training prolonged contraction duration in the young adult rat (P less than 0.05). The relaxation phase was more sensitive than the contraction phase to changes in temperature, especially in the aged rat (P less than 0.02). The ratio of developed tension to time-to-peak tension of the isometric twitch was not affected by exercise training. Because exercise training affects cardiac function in opposite directions from young adulthood to senescence, caution is advised in extrapolating results from exercise studies in young adult rats to populations of older animals.
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