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Any constituent part of the cytoplasm, all of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures. Platelike region of a muscle sarcomere to which the plus ends of actin filaments are attached. Any constituent part of a contractile fiber, a fiber composed of actin, myosin, and associated proteins, found in cells of smooth or striated muscle. Fibers, composed of actin, myosin, and associated proteins, found in cells of smooth or striated muscle. The contractile element of skeletal and cardiac muscle; a long, highly organized bundle of actin, myosin, and other proteins that contracts by a sliding filament mechanism. The repeating unit of a myofibril in a muscle cell, composed of an array of overlapping thick and thin filaments between two adjacent Z discs. A region of a sarcomere that appears as a light band on each side of the Z disc, comprising a region of the sarcomere where thin (actin) filaments are not overlapped by thick (myosin) filaments; contains actin, troponin, and tropomyosin; each sarcomere includes half of an I band at each end.

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: I band
Acc: GO:0031674
Aspect: Cellular Component
Desc: A region of a sarcomere that appears as a light band on each side of the Z disc, comprising a region of the sarcomere where thin (actin) filaments are not overlapped by thick (myosin) filaments; contains actin, troponin, and tropomyosin; each sarcomere includes half of an I band at each end.
Synonyms:
  • J disc
  • isotropic disc
  • I disc
Proteins in PDR annotated with:
   This term: 41 [Search]
   Term or descendants: 191 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0031674 - I band (interactive image map)
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