这个词是什么意思？
A 31-amino acid peptide that is the C-terminal fragment of BETA-LIPOTROPIN. It acts on OPIOID RECEPTORS and is an analgesic. Its first four amino acids at the N-terminal are identical to the tetrapeptide sequence of METHIONINE ENKEPHALIN and LEUCINE ENKEPHALIN.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D001615 · MeSH 2026。
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