SPERM-ACTIVATED CURRENTS IN ASCIDIAN OOCYTES

被引:19
作者
DEFELICE, LJ [1 ]
KELL, MJ [1 ]
机构
[1] MARINE BIOL LAB, WOODS HOLE, MA 02543 USA
关键词
D O I
10.1016/0012-1606(87)90213-2
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Using patch electrodes and the whole-cell recording technique to study fertilization currents in ascidian oocytes under voltage clamp, this paper shows that between -85 and 0 mV the currents are inward with an initial peak ranging from 50 to 600 pA. Voltages more positive than 0 mV inhibit initiation of the fertilization current, but by allowing the oocyte to return briefly to its resting potential fertilization occurs and fertilization currents are outward at positive potentials. By comparison with previous single-channel work, a fertilizing spermatozoon opens about 300 large-conductance channels with zero reversal potential.
引用
收藏
页码:123 / 128
页数:6
相关论文
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