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. 1983 Dec 2;222(4627):1021-3.
doi: 10.1126/science.6648514.

Ultraviolet visual pigment in a vertebrate: a tetrachromatic cone system in the dace

F I Hárosi, Y Hashimoto

Ultraviolet visual pigment in a vertebrate: a tetrachromatic cone system in the dace

F I Hárosi et al. Science. .

Abstract

Microspectrophotometric measurements of optically isolated photoreceptors in the Japanese dace, a cyprinid fish, revealed four spectroscopically distinguishable cone pigments and one rod pigment. A visual pigment that absorbs in the near ultraviolet was found in small single cones.

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