| 释义 |
me·thi·o·nine
\mə̇ˈthīəˌnēn, -_nə̇n\ noun
Etymology: International Scientific Vocabulary me- (from methyl) blend of meth- + thion- + -ine
: a crystalline essential amino acid CH3SCH2CH2CH(NH2)COOH that occurs in the l-form as a constituent of many proteins (as casein and egg albumin), that is important especially as a source of sulfur for the biosynthesis of cystine and as a source of methyl groups for transmethylation reactions (as in the biosynthesis of choline, creatine, and adrenaline), that is prepared synthetically in the racemic dl-form, and that is used as a dietary supplement for humans and their domestic mammals and poultry and in the treatment of fatty infiltration of the liver; α-amino-γ-methyl-mercapto-butyric acid |