Journal
NEURON
Volume 27, Issue 3, Pages 513-523Publisher
CELL PRESS
DOI: 10.1016/S0896-6273(00)00062-3
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Funding
- NEI NIH HHS [R01-EY04801, R01 EY004801-18] Funding Source: Medline
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Mice express S and M opsins that form visual pigments for the detection of light and visual signaling in cones. Here, we show that S opsin transcription is higher than that of M opsin, which supports ultraviolet (UV) sensitivity greater than midwavelength sensitivity. Surprisingly, most cones coexpress both S and M opsins in a common cone cell type throughout the retina. All cones express M opsin, but the levels are graded from dorsal to ventral. The levels of S opsin are relatively constant. However, in the far dorsal retina, S opsin is repressed stochastically, such that some cones express M opsin only. These observations indicate that two different mechanisms control M and S opsin expression. We suggest that a common cone type is patterned across the retinal surface to produce phenotypic cone subtypes.
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