When most of us think of vitamin b12 , the molecule we really have in mind is cyanocobalamin or cyano b12 .

我们大多数人想到维生素b12时，我们所认为的它的分子是氰钴胺或氰基b12。

Whenever we swallow a conventional vitamin pill , any cyano b12 present gets carried along and absorbed by an intricate " bucket brigade " of b12-binding proteins .

我们吞一个常规的维生素片时，任何氰基b12的表现是被携带走，然后通过b12相关的蛋白质“机动部队”吸收。

The fact that most of our vitamin pills contain cyano rather than methyl b12 is largely an accident of history , the result of using charcoal to filter extracts during the isolation of b12 .

事实上，我们服用的大多数维生素药片还有的是氰基b12而不是甲基b12，这是历史遗留的错误，结果在分离b12时使用碳来过滤萃取。

As its name suggests , cyano b12 has a cyanide group ( cn ) attached , whereas methyl b12 carries a methyl group ( ch3 ) instead .

从名字上看，氰基b12有一个氰基团（cn），而甲基b12用甲基（ch3）取代。