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单词 cystine
释义 cys·tine
\ˈsiˌstēn, -_stə̇n\ noun
(-s)
Etymology: cyst- + -ine; fr its discovery in urinary calculi
: a colorless crystalline amino acid [−SCH2CH(NH2)COOH]2 occurring as a constituent of most proteins (as the keratins in hair, wool, and horn) from which it can be obtained by hydrolysis and yielding cysteine on reduction; β,β′-dithio-di-alanine
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