OBO ID: GO:0097228 |
Term Name: | sperm principal piece | Search Ontology: | |
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Synonyms: |
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Definition: | The segment of the sperm flagellum where the mitochondrial sheath ends, and the outer dense fibers (ODFs) associated with outer axonemal doublets 3 and 8 are replaced by the 2 longitudinal columns of the fibrous sheath (FS) which run the length of the principal piece and are stabilized by circumferential ribs. The principal piece makes up ~2/3 of the length of the sperm flagellum and is defined by the presence of the FS and of only 7 (rather than 9) ODFs which taper and then terminate near the distal end of the principal piece. | ||
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Ontology: | GO: Cellular Component QuickGO AmiGO |
EXPRESSION
No data available
PHENOTYPE
No data available