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Figure 2


Fig. 2. Mean absorptance spectra of pigmented cone oil droplets in 33-week-old chickens measured using microspectrophotometry. Panels correspond to oil droplets measured in the dorsal (A) and ventral (B) retina of a chicken reared in dim light and the dorsal (C) and ventral (D) retina of a chicken reared in bright light. C, Y, R and P refer to the oil droplets found in the short-(SWS), medium-(MWS) and long-wavelength-sensitive (LWS) single cones and the principal member of the LWS double cones, respectively. Note the difference in spectra between light-treatment groups, especially with respect to the Y-, R- and P-type oil droplets, and also between dorsal and ventral retina locations within the same bird. Each spectrum is the average of the individual spectra from 10 different oil droplets of a given oil-droplet type.





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