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XB-ART-27498
Dev Biol 1988 May 24;4491-2:332-6.
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Dopamine modifies the balance of rod and cone inputs to horizontal cells of the Xenopus retina.

Witkovsky P, Stone S, Besharse JC.


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Dopamine (greater than or equal to 2 microM) increased the cone input and suppressed the rod input to axon-bearing horizontal cells of the Xenopus retina. Dopamine (10 microM) also depolarized the horizontal cell by about 9 mV. The D2-dopamine antagonists spiperone and metoclopramide had the opposite action to dopamine, whereas the D1-dopamine antagonist SCH 23390 was without effect. None of the agents tested modified the light-evoked responses of rods.

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