这个词是什么意思？
A class I viral fusion protein that forms the characteristic spikes, or peplomers, found on the viral surface that mediate virus attachment, fusion, and entry into the host cell. During virus maturation, it is cleaved into two subunits: S1, which binds to receptors in the host cell, and S2, which mediates membrane fusion.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D064370 · MeSH 2026。
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