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A hyperpolarizing rod bipolar cell in the sea lamprey, Petromyzon marinus
A rod bipolar cell that reduces activity in the sea lamprey
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Abstract
Lamprey rod bipolar cells are OFF cells with little or no cone input and a morphology similar to rod photoreceptors.
- Lamprey possess rod bipolar cells that predominantly receive input from rods rather than cones.
- These rod bipolar cells exhibit a morphology and spectral sensitivity closely resembling rod photoreceptors.
- In conditions of background light that saturate rods, these rod bipolar cells are also saturated and unable to respond to light increments.
- Findings suggest that early vertebrate ancestors may have had a more flexible retinal structure than previously recognized.
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