Microspectrophotometric measurements of visual pigments in two species of turtle, Pseudemys scripta and Chelonia mydas.
D000818:Animals; D010786:Photoreceptor Cells / Q000032:analysis; D012160:Retina / Q000032:analysis; D012168:Retinal Pigments / Q000032:analysis*; D013053:Spectrophotometry; D014426:Turtles; D014801:Vitamin A / Q000032:analysis
D012168:Retinal Pigments; D014801:Vitamin A