…The homologous proteins β-actin and γ-actin are widely distributed in nonmuscle cells, forming microfilaments that cause dynamic morphological changes in cells. Some microfilaments bind to myosin and are distributed as thick fibers called stress fibers that run straight through the cytoplasm, but many microfilaments are distributed as thin fibers that run parallel to the direction of cell elongation and as fiber bundles that run parallel along the cell surface. What is important for cell morphological changes and movement is that they also have attachment points to the cell membrane. … *Some of the terminology that mentions "stress fiber" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…広く非筋細胞にも同族タンパク質のβ‐アクチンおよびγ‐アクチンが分布していて,マイクロフィラメントを形づくって細胞のダイナミックな形態変化を引き起こしている。マイクロフィラメントのあるものは,ミオシンと結合してストレス・ファイバーstress fiberとよばれる細胞質を直線的に走る太い繊維として分布するが,多数のマイクロフィラメントは細胞の伸長方向に平行に走る細繊維として,また,細胞表層に沿って平行に走る繊維束として分布する。細胞の形態変化や運動にとって重要なことは,細胞膜にも結合点をもつことである。… ※「stress fiber」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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