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Fig. 6 | BMC Genetics

Fig. 6

From: Protanopia (red color-blindness) in medaka: a simple system for producing color-blind fish and testing their spectral sensitivity

Fig. 6

The behavioral spectral sensitivities of the control and lws medaka. (a) The schematic diagram of wavelengths and colors of light at λ = 500 ~ 900 nm. The lights gradually change color from green (G), yellow (Y), orange (O), to red (R), and then become invisible (near-infrared light, NIR) to humans. The color medaka actually provokes in the brain from these monochromatic lights is unknown. (b and c) Visible lights for the light-adapted control (b) and lws (c) medaka. The fish with wild-type LWS opsins could follow the stripes up to λ = 820 ~ 830 nm, and the lws medaka could follow them up to λ = 730 ~ 740 nm. This ~90-nm decrease of the longest wavelength of visible light in the photopic vision in the lws medaka demonstrates that; (1) the LWS-dependent cone vision, which covers up to λ = 830 nm, was severely suppressed in the lws mutants, and (2) the RH2-dependent cone vision should cover up to λ = 740 nm. (d) Visible lights for the dark-adapted control and lws medaka. Both medaka can perceive monochromatic light up to λ = 830 nm, suggesting that lws medaka retain the ordinary RH1-dependent rod vision

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