钴胺素上维生素B12的形式。

The forms of vitamin B12 on the transcobalamins.

MacDonald C M, Farquharson J, Bessent R G, Adams J F

Clin Sci Mol Med. 1977 Feb;52(2):215-8. doi: 10.1042/cs0520215.

Abstract

The transcobalamins from normal serum were obtained in two fractions. One contained transcobalamin I and transcobalamin III: the other contained transcobalamin II. The forms of vitamin B12 in the two fractions were then examined. 2. Methylcobalamin and adenosylcobalamin were found in both fractions. Hydroxocobalamin was found in the fraction containing transcobalamin I and transcobalamin III. Cyanocobalamin was found in both fractions in two cases, in the transcobalamin III fraction only in one case and was absent in one case.

摘要

从正常血清中获得的转钴胺素分为两个组分。一个组分含有转钴胺素I和转钴胺素III；另一个组分含有转钴胺素II。然后对这两个组分中维生素B12的形式进行了检测。2. 在两个组分中均发现了甲钴胺和腺苷钴胺。在含有转钴胺素I和转钴胺素III的组分中发现了羟钴胺。在两个病例的两个组分中均发现了氰钴胺，在一个病例中仅在转钴胺素III组分中发现了氰钴胺，而在一个病例中未发现氰钴胺。