这个词是什么意思？
A non-essential amino acid occurring in natural form as the L-isomer. It is synthesized from GLYCINE or THREONINE. It is involved in the biosynthesis of PURINES; PYRIMIDINES; and other amino acids.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D012694 · MeSH 2026。
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