Effects of pH on the genesis of membrane potential changes at fertilization in the egg of the frog Rana cameranoi
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The apparent change in the egg membrane potential at fertilization gives rise to fertilization potential (FP). FP is the initial, transient electrical block to polyspermy as shown in most species especially those exhibiting external fertilization, and it protects the egg from a second sperm entry until the permanent, mechanical block is set up.
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