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sperm midpiece
Term Information
Accession
GO:0097225
Name
sperm midpiece
Ontology
cellular_component
Synonyms
None
Alternate IDs
None
Definition
The highly organized segment of the sperm flagellum which begins at the connecting piece and is characterized by the presence of 9 outer dense fibers (ODFs) that lie outside each of the 9 outer axonemal microtubule doublets and by a sheath of mitochondria that encloses the ODFs and the axoneme; the midpiece terminates about one-fourth of the way down the sperm flagellum at the annulus, which marks the beginning of the principal piece.
Source:
GOC:cjm,
MP:0009831
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