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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. All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures. The cytoplasm of a muscle cell; includes the sarcoplasmic reticulum. A fine reticular network of membrane-limited elements that pervades the sarcoplasm of a muscle cell; continuous over large portions of the cell and with the nuclear envelope; that part of the endoplasmic reticulum specialized for calcium release, uptake and storage. The portion of sarcoplasmic reticulum devoted to calcium ion storage and calcium ion release. An elaborate tubulolamellar membrane system that underlies the postsynaptic cell membrane. The portion of the free sarcoplasmic reticulum consisting of longitudinal tubules that connect terminal cisternae. The irregular network of unit membranes, visible only by electron microscopy, that occurs in the cytoplasm of many eukaryotic cells. The membranes form a complex meshwork of tubular channels, which are often expanded into slitlike cavities called cisternae. The ER takes two forms, rough (or granular), with ribosomes adhering to the outer surface, and smooth (with no ribosomes attached). The volume enclosed by the membranes of the sarcoplasmic reticulum. The lipid bilayer surrounding the sarcoplasmic reticulum. Organized structure of distinctive morphology and function, bounded by a single or double lipid bilayer membrane and occurring within the cell. Includes the nucleus, mitochondria, plastids, vacuoles, and vesicles. Excludes the plasma membrane.

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: sarcoplasmic reticulum
Acc: GO:0016529
Aspect: Cellular Component
Desc: A fine reticular network of membrane-limited elements that pervades the sarcoplasm of a muscle cell; continuous over large portions of the cell and with the nuclear envelope; that part of the endoplasmic reticulum specialized for calcium release, uptake and storage.
Synonyms:
  • GO:0008221
Proteins in PDR annotated with:
   This term: 71 [Search]
   Term or descendants: 85 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0016529 - sarcoplasmic reticulum (interactive image map)
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