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Figure 12


Fig. 12. Absolute absorbance spectra of isolated photoreceptors in rainbow trout. (A) Single cones in the young alevin contain a visual pigment maximally sensitive to ultraviolet light (UV) while single cones in the smolt retina contain a visual pigment maximally sensitive to blue light (BL). (B) Green (G) and red (R) visual pigments present in the double cones of the smolt (one pigment per member), and rod opsin pigment (r) contained in the rods.