1951
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Itoh T. Amino acid replacement in the protein S5 from a spectinomycin resistant mutant of Bacillus subtilis. MOLECULAR & GENERAL GENETICS : MGG 1976; 144:39-42. [PMID: 131241 DOI: 10.1007/bf00277301] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Ribosomal protein S5 was isolated from wild type Bacillus subtilis ATCC 6633 and from a spectinomycin resistant mutant (BSPC 111) derived from spectinomycin sensitive to resistance is accomtrypsin and all the tryptic peptides were isolated by column- and paper-chromatography. By comparative amino acid analyses of the peptides, it was demonstrated that the S5 from the mutant differs from the wild type S5 by a replacement of one amino acid, namely lysine by isoleucine in the peptide T9. The results are compared with E. coli spectinomycin resistant mutants.
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1952
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Itoh T, Tamura T, Matsumoto T. Proton magnetic resonance spectra of tetracyclic triterpene alcohols under the influence of a lanthanide shift reagent. Steroids 1976; 27:275-85. [PMID: 1273892 DOI: 10.1016/0039-128x(76)90104-5] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The proton magnetic resonance spectra were measured for four series of tetracyclic triterpen-3beta-ols, i.e. 5alpha-lanostane, 5alpha-euphane, 5alpha-tirucallane, and 5alpha-dammarane series, in the presence of a molar equivalent of tris (dipivalomethanato) europium, a lanthanide shift reagent. The spectral pattern measured in the presence of the shift reagent was found useful for distinguishing each series and also for characterizing each skeletal isomer of tetracyclic triterpene alcohols.
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1953
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Itoh T, Satoh H, Adachi S. Preparation of crystalline myoglobin from chicken (Gallus gallus) muscle. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. B, COMPARATIVE BIOCHEMISTRY 1976; 55:559-61. [PMID: 1000949 DOI: 10.1016/0305-0491(76)90017-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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1954
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Itoh T. Amino acid replacement in the protein s5 from a spectinomycin resistant mutant ofBacillus subtilis. ACTA ACUST UNITED AC 1976. [DOI: 10.1007/bf00701258] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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1955
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Funahashi K, Esaki R, Hayashi J, Itoh T, Shibata K. Clinical Studies on Changes in Serum Glycoproteins in Cancer Chemotherapy. Chemotherapy 1976. [DOI: 10.1007/978-1-4613-4352-3_45] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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1956
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Nagumo T, Fujihara M, Ogawa T, Kawanishi Y, Itoh T, Kuboki Y. Properties of 6 N HCl solubilized collagen. THE KITASATO ARCHIVES OF EXPERIMENTAL MEDICINE 1975; 48:189-91. [PMID: 1234927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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1957
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Itoh T, Tamura T, Matsumoto T. 24-Methylenedammarenol: a new triterpene alcohol from shea butter. Lipids 1975; 10:808-13. [PMID: 1207416 DOI: 10.1007/bf02532325] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A new triterpene alcohol was isolated from shea butter and its structure was shown to be 24-methylenedammarenol (24-methylene-5alpha-dammar-20[21]-en-3beta-o1). Dammaradienol (5alpha-dammara-20[21],24-dien-3beta-o1) also was isolated from shea butter.
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1958
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Abstract
The occurrence of a novel phospholipid, pyrophosphatidic acid, in the lipid extracts of yeasts (23 species), bacteria (E. coli), algae (chlorella), mammalia (human, rabbit, guinea pig, and mouse), insect (cockroach), fish (carp), mollusc (clam), and spermatophyta (spinach) was investigated. Pyrophosphatidic acid was found exclusively in the lipid extracts of several kinds of yeast species, but not in other normal living species (animals, plants, and microorganisms) so far investigated. All of the yeast species containing this lipid belong to the asporogenous yeasts (Cryptococcus neoformans CBS-132, Cryptococcus laurentii Z 6-5, Rhodotorula glutinis H 3-9-1, Rhodotorula rubra AY-2, Kloeckera apiculata KK-3, and Trichosporon cutaneum KC 4-3), and ballistosporogenous yeast (Sporobolomyces salmonicolor WF 174). In contrast, no detectable amount of pyrophosphatidic acid was found in the cellular lipids of ascosporogenous yeasts.
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1959
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Jeong TM, Itoh T, Tamura T, Matsumoto T. Analysis of methylsterol fractions from twenty vegetable oils. Lipids 1975; 10:634-40. [PMID: 1186450 DOI: 10.1007/bf02532729] [Citation(s) in RCA: 44] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The 4-monomethylsterol and 4,4-dimethylsterol fractions were separated from the unsaponifiables of 20 vegetable oils by preparative thin layer chromatography, and their compositions were determined by gas liquid chromatography. Tentative identification of the individual components of these fractions was carried out by gas liquid chromatography and combined gas liquid chromatography-mass spectrometry. Among 4-monomethylsterols, obtusifoliol, gramisterol, and citrostadienol occur abundantly in most of the oils. Cycloeucalenol also occurs in some of the oils as a major component of 4-monomethylsterols. Other 4-monomethylsterols tentatively identified are: lophenol, 31-norlanosterol, 31-norcycloartenol, and 31-norlanostenol and/or 4alpha-methylzymostenol. Among 4,4-dimethylsterols, cycloartenol and 24-methylenecycloartanol followed by beta-amyrin and cycloartanol are common to most of the oils. Butyrospermol, alpha-amyrin, lupeol, and cyclobranol together with a 4,4-dimethylsterol, presumably lanostenol, occur in some of the oils. Cyclolaudenol is present in poppy seed oil. Besides these compounds, each of the oils contains some unidentified members of 4-monomethylsterols and 4,4-dimethylsterols. The methylsterol fraction of capsicum seed oil as compared with that of the other oils is characterized by its very high content of lophenol and cycloartanol together with three other members, presumably 31-norlanostenol, 4alpha-methylzymostenol, and lanostenol.
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1960
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Mostafavi M, Itoh T, Mittra R. Excitation of an optical fiber by a Gaussian beam. APPLIED OPTICS 1975; 14:2190-2193. [PMID: 20154982 DOI: 10.1364/ao.14.002190] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In this paper we present the results of an in-depth analysis of the problem of Gaussian beam excitation of optical fibers at normal incidence. The method entails the application of the continuity conditions at the interface located at the fiber end using Gaussian beams with different spot sizes as our excitation source. Next, the simultaneous set of equations obtained is numerically solved for the reflected, guided, and radiated modal coefficients and their corresponding powers.
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1961
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Itoh T, Tamura T, Matsumoto T. 24-Methylenelanost-9(11)-en-3beta-ol, new triterpene alcohol from shea butter. Lipids 1975; 10:454-60. [PMID: 1160520 DOI: 10.1007/bf02532428] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A new triterpene alcohol was isolated fron shea butter and its structure was shown to be 24-methylenelanost-9(11)-en-3beta-ol. Gas chromatographic correlations between this triterpene alcohol and other related compounds are discussed.
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1962
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Itoh T, Tamura T, Iida T, Matsumoto T. Gas chromatographic differentiation of 4-desmethyl-, 4-monomethyl- and 4,4-dimethyl-sterols. Part II : differentiation of sterols based on deltaRAc-values on four stationary phases. Steroids 1975; 26:93-106. [PMID: 1166485 DOI: 10.1016/0039-128x(75)90008-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The deltaRAc-values, i.e., ratios of retention data for sterol acetates to those for the corresponding free sterols, were determined for fourteen 4-desmethylsterols, seven 4-monomethylsterols and twenty-two 4,4-dimethylsterols on SE-30, OV-17, QF-1 and HiEFF-8B stationary phases. The QF-1 phase is found sperior to the others in affording the values which are the most effective for differentiation between the three sterol groups. Within the same sterol group, the values for individual sterol members on any of the stationary phases differ to some extent due to minor variations in their skeletal structure. These differences are useful for distinguishing individual members of the same sterol group differing in their skeletal structure, particularly in the position of double bond. The relative deltaRAc-values, i.e., ratios of deltaRAc-values of individual sterols to the deltaRAc-value of a standard sterol, are found almost independent upon the operating conditions of gas liquid chromatography and may be regarded as a characteristic value of sterols on one and the same stationary phase.
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1963
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Itoh T, Yamamoto C. [Population projections for Japan, 1970-2050, estimated in February 1975]. JINKO MONDAI KENKYU. [JOURNAL OF POPULATION PROBLEMS] 1975; 135:35-48. [PMID: 12229545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
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1964
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Itoh T, Kaneko H. Postitional specificity of fatty acids in pyrophosphatidic acid from Cryptococcus neoformans. J Biochem 1975; 77:777-81. [PMID: 168186 DOI: 10.1093/oxfordjournals.jbchem.a130782] [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
Pyrophosphatidic acid isolated from Cryptococcus neoformans was degraded to phosphatidic acid in aqueous pyridine. The phosphatidic acid was hydrolyzed by phospholipase A (EC 3.1.1.4) of Crotalus adamanteus to lysophosphatidic acid and 2-positioned fatty acids. From the analyses of the fatty acid composition of pyrophosphatidic acid and its degraded products (phosphatidid acid, lysophosphatidic acid, and fatty acid), it was concluded that most of the saturated fatty acids of pyrophosphatidic acid were at the 1,1'-positions while the unsaturated fatty acids were largely confined to the 2,2'-positions. The positional specificity of the fatty acids in pyrophosphatidic acid coincided with that of ordinary glycerophosphatides.
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1965
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Hashimoto A, Tanaka T, Itoh T, Kitamura N, Kawada T. [Simultaneous replacement of the mitral valve, aortic valve, and ascending aorta in 2 cases of Marfan's syndrome]. KYOBU GEKA. THE JAPANESE JOURNAL OF THORACIC SURGERY 1975; 28:25-34. [PMID: 1168794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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1966
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Nakamura M, Itoh T, Yoshii Z. A mode of the growth of Mycobacterium lepraemurium in a cell-free liquid medium (38501). PROCEEDINGS OF THE SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE. SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE (NEW YORK, N.Y.) 1975; 148:183-6. [PMID: 1093187 DOI: 10.3181/00379727-148-38501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The first report regarding in vitro growth patterns of M. lepraemurium was presented. Evidence is indicated that a growth mode of a single cell of M.lepraemurium in vitro is similar to that of culturable mycobacterium, especially atypical mycobacterium. This finding has added one property to characteristics of M. lepraemurium which have been already known.
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1967
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Okazaki K, Itoh T, Conrad H. The Effect of Grain Size on the Strength of a Ti-7.4 at%Al Alloy at Low Temperatures. ACTA ACUST UNITED AC 1974. [DOI: 10.2320/matertrans1960.15.159] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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1968
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Itoh T, Omori K. Biosynthesis and storage of catecholamines in pheochromocytoma and neuroblastoma cells. THE JOURNAL OF LABORATORY AND CLINICAL MEDICINE 1973; 81:889-96. [PMID: 4145540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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1969
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Suzuki S, Inoue M, Mizumoto H, Fujiwara T, Itakura K, Hamada Y, Mitani H, Itoh T, Seki K, Kami K, Hamada M. Autoradiographic studies on the rat embryos in the pre-implantation stages. EXPERIENTIA 1973; 29:84-5. [PMID: 4738095 DOI: 10.1007/bf01913268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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1970
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Lown JW, Itoh T, Ono N. Studies Relating to Aziridine Antitumor Antibiotics. Part I. Asymmetric Syntheses. Part II. Chiral Aziridines and their Conversion to α-Aminoacids. CAN J CHEM 1973. [DOI: 10.1139/v73-130] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Separable diastereomeric cis-l-menthyl 2-phenyl-3-aziridinecarboxylates (4 and 5) were prepared by the Gabriel reaction. N-Acylation with p-nitrobenzoyl chloride or p-anisoyl chloride of 4 and 5 gives 7 and 8, and 23 and 24, respectively. Sodium iodide-catalyzed rearrangement of the N-acylated aziridines is regiospecific with exclusive attack at C-2 and from 8 is obtained the chiral 2-oxazolines cis-9 and trans-10 in a ratio of 30:70 together with the unsaturated amide 11. The structure of the latter was proven by independent synthesis. The intermediate l-menthyl N-p-nitrobenzoyl-3-iodophenyl-alaninate (18) was isolated at lower temperatures and shown to form the equilibrium mixture of 9 and 10 with triethylamine owing to partial racemization by a Finkelstein identity reaction. Use of an N-p-anisoyl substituent in the aziridine improves the yield of chiral 2-oxazolines by preventing the formation of 11, and allows the separation of pure cis- and trans-oxazolines for characterization. The aziridines bearing N-p-anisoyl substituents display a greater sensitivity to attack by weaker nucleophiles than the p-N-nitrobenzoyl analogs.Acid hydrolysis of 9 and 10 gives D-allo-β-phenylserine in an optical yield of about 17% from which 5 and 8 are tentatively assigned the 2R,3R configuration. Similar acid hydrolysis of the 2-p-anisyl-2-oxazoline (26b) allowed the isolation of the intermediate l-menthyl O-anisoyl-allo-β-phenylserinate (30a), hydrolysis of which gave D-allo-β-phenylserine in about 18% optical yield. The isolation of allo-β-phenylserine only from cis- and trans-2-oxazolines is attributed to acid-catalyzed inversion at the benzylic center to the conformationally more stable allo form.
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1971
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Tanaka K, Tamaki M, Itoh T, Otaka E, Osawa S. Ribosomes from spiramycin resistant mutants of Escherichia coli Q13. MOLECULAR & GENERAL GENETICS : MGG 1972; 114:23-30. [PMID: 4552496 DOI: 10.1007/bf00268743] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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1972
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Otaka E, Itoh T, Osawa S, Tanaka K, Tamaki M. Peptide analyses of a protein component, 50-8, of 50s ribosomal subunit from erythromycin resistant mutants of Escherichia coli and Escherichia freudii. MOLECULAR & GENERAL GENETICS : MGG 1972; 114:14-22. [PMID: 4552494 DOI: 10.1007/bf00268742] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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1973
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Itoh T, Tomizawa J. INACTIVATION OF CHROMOSOMAL FRAGMENTS TRANSFERRED FROM Hfr STRAINS. Genetics 1971; 68:1-11. [PMID: 17248522 PMCID: PMC1212574 DOI: 10.1093/genetics/68.1.1] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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1974
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Ogura H, Sugimoto S, Itoh T. Electron-impact fragmentation ofN-substituted 2-aminobenzoxazoles and 2-aminobenzothiazoles. ACTA ACUST UNITED AC 1970. [DOI: 10.1002/oms.1210031014] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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1975
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Zen-Yoji H, Sakai S, Kudoh Y, Itoh T, Terayama T. Antigenic schema and epidemiology of Vibrio parahaemolyticus. HEALTH LABORATORY SCIENCE 1970; 7:100-8. [PMID: 5449667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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