Ishijima S, Hamaguchi Y
Biological Laboratory, Faculty of Science, Tokyo Institute of Technology, Japan.
Biophys J. 1993 Oct;65(4):1445-8. doi: 10.1016/S0006-3495(93)81210-4.
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.
在界面附近,海胆精子几乎是绕圈游动。从上方观察时,通常在盖玻片下表面是顺时针方向,而在载玻片上表面是逆时针方向。对去膜精子的研究表明,钙离子(Ca2+)调节了用三磷酸腺苷(ATP)重新激活的精子的圆周运动方向。这一发现表明,钙离子改变了精子鞭毛三维弯曲波的手性。