Abstract
Outer segment membrane current was recorded from single rod photoreceptors of Taylor-Kollros Stage III and Stage XXIII tadpoles. Response-intensity relations and kinetics of the photocurrent were similar to those of adult amphibian photoreceptors, suggesting that phototransduction is quantitatively similar in developing rods and adult rods. Maximum response amplitude was about 13 that of adult rods, probably because of the shorter length of the outer segment in tadpoles (20 vs 50μm).
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