这个词是什么意思？
Filamentous proteins that are the main constituent of the thin filaments of muscle fibers. The filaments (known also as filamentous or F-actin) can be dissociated into their globular subunits; each subunit is composed of a single polypeptide 375 amino acids long. This is known as globular or G-actin. In conjunction with MYOSINS, actin is responsible for the contraction and relaxation of muscle.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D000199 · MeSH 2026。
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