| 释义 |
active methyl ac·tive meth·yla methyl group attached to a quaternary ammonium ion or a tertiary sulfonium ion that can take part in transmethylation reactions, for example, methyl groups in choline and in S-adenosyl-l-methionine, which are thus methyl donors.ac·tive meth·yl (ak'tiv meth'il) A methyl group attached to a quaternary ammonium ion or a tertiary sulfonium ion that can take part in transmethylation reactions. |