这个词是什么意思？
One of the endogenous pentapeptides with morphine-like activity. It differs from LEU-ENKEPHALIN by the amino acid METHIONINE in position 5. Its first four amino acid sequence is identical to the tetrapeptide sequence at the N-terminal of BETA-ENDORPHIN.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D004744 · MeSH 2026。
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