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endoplasmic reticulum
Term Information
Accession
GO:0005783
Name
endoplasmic reticulum
Ontology
cellular_component
Synonyms
ER
Alternate IDs
None
Definition
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).
Source:ISBN:0198506732
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