胆碱
蛋氨酸
磷
放射化学
磷-32
化学
内科学
生物化学
医学
核苷酸
有机化学
氨基酸
基因
作者
D Cayer,W. E. Cornatzer
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:1949-06-17
卷期号:109 (2842): 613-615
被引量:6
标识
DOI:10.1126/science.109.2842.613
摘要
bation with plasma for 2 hr at 370 C,1 the pH of the digestion mixture being 4.5. Striking results were obtained with a crude extract of baker's yeast (containing 3.7 [tg Be per cc in conjugated form) from which 0.2 cc plasma liberated 0.7 [tg folic acid in 1 hr at 370 C. Additional evidence of the enzymatic role of plasma is offered by the use, as substrate, of pure crystalline vitamin B, conjugate,2 which gives identical results.
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