A comparative study of the membrane potential from before fertilization through early cleavage in two frogs, Rana pipiens and Xenopus laevis

1. 1. The membrane potential of Rana pipiens eggs (−55.0mV ± 11.2(16)) was more likely to recover from impalement and was always more negative than that of eggs of Xenopus laevis (−19.3 mV ± 4.2(68)). It was also much more negative than previously reported. 2. 2. Essentially similar membrane resista...

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