ECB-ART-52330
Dev Growth Differ
1973 Feb 01;144:311-324. doi: 10.1111/j.1440-169X.1973.00311.x.
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OBSERVATIONS ON THE CENTRIOLES OF THE SEA URCHIN SPERMATOZOON.
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The spermatozoon of Lytechinus variegatus has two parallel centrioles. The basal body of the flagellum consists of the proximal centriole (a short cylinder of nine tubule-triplets) and its distal extension of nine tubule-doublets. The distal centriole lies near the distal end of the basal body, between the nucleus and the mitochondrion. The observations suggest that both the proximal and the distal centrioles are polarized structures, their tubule-triplets pitched in the same direction and their distal ends associated with the flagellar axoneme and with the mitochondrion, respectively. The distal centriole in different spermatozoa occupies different positions around the basal body-flagellum complex.
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