Cell Component
stress fiber
stress fi·ber
Subclass of:
Microfilaments
Definitions related to stress fibers:
  • A contractile actin filament bundle that consists of short actin filaments with alternating polarity, cross-linked by alpha-actinin and possibly other actin bundling proteins, and with myosin present in a periodic distribution along the fiber.
    Gene Ontology Dictionary
    Gene Ontology Consortium, 2021
  • Bundles of actin filaments (ACTIN CYTOSKELETON) and myosin-II that span across the cell attaching to the cell membrane at FOCAL ADHESIONS and to the network of INTERMEDIATE FILAMENTS that surrounds the nucleus.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
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