共查询到20条相似文献，搜索用时 15 毫秒
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M L Pall 《Biochimica et biophysica acta》1970,211(3):513-520
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Deoxyribonucleic acid modification in six strains of mycobacteria was investigated. The presence of 5-methylcytosine in the virulent strain Mycobacterium tuberculosis H37Rv and its absence in the avirulent strain M. tuberculosis H37Ra and other saprophytic, fast-growing mycobacteria appear to be the salient features. However, deoxyribonucleic acid from M. smegmatis SN2 lysogenized with the temperature phage I3 showed the presence of 5-methylcytosine. All of the strains had N6-methyladenine. 相似文献
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Ascorbic acid in the brain. 总被引：1，自引：0，他引：1
M Schreiber S Trojan 《Physiological research / Academia Scientiarum Bohemoslovaca》1991,40(4):413-418
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M Kinuta 《Biochimica et biophysica acta》1978,542(1):56-62
A new amino acid has been isolated from the normal human urine. The chemical structure of the amino acid was determined to be alpha-hydroxy-beta-keto-gamma-aminobutyric acid based on its physical properties involving NMR, infrared and mass spectra, as well as chemical degradation and synthesis. In six healthy adults the urinary contents of the new amino acid were 3.2--4.5 mumol/24 h. 相似文献
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C Bernstein 《Microbiological reviews》1981,45(1):72-98
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R S McLachlan 《BMJ (Clinical research ed.)》1981,283(6286):274-275
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M D Milne 《The Biochemical journal》1971,122(1):9P-10P