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. 1993 Oct;65(4):1445–1448. doi: 10.1016/S0006-3495(93)81210-4

Calcium ion regulation of chirality of beating flagellum of reactivated sea urchin spermatozoa.

S Ishijima 1, Y Hamaguchi 1
PMCID: PMC1225871  PMID: 8274638

Abstract

Near an interface, sea urchin spermatozoa swim almost in circles. The direction is usually clockwise at the lower surface of a coverslip and counterclockwise at the upper surface of a glass slide, when viewed from above. Examination of demembranated spermatozoa has shown that Ca2+ regulates the direction of the circular motion of spermatozoa reactivated with adenosine triphosphate (ATP). This finding suggests that Ca2+ changes the chirality of the three-dimensional bending waves of sperm flagella.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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