Correlative ultrastructural and electrophysiological studies of sperm-egg interactions of the sea urchin, Lytechinus variegatus.

Abstract

The sequence of ultrastructural events following the onset of the sperm-induced conductance increase in eggs of the sea urchin, Lytechinus variegatus, was investigated. Eggs voltage clamped at -20 mV were fixed 1 to 20 sec after onset of the conductance increase caused by single sperm. Continuity between the plasma membranes of the sperm and egg was first… (More)

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