Some recent work on visual pigments.
D000042:Absorption; D000818:Animals; D001001:Anura; D005399:Fishes; D008027:Light; D010786:Photoreceptor Cells / Q000032:analysis; D012168:Retinal Pigments / Q000138:chemical synthesis / Q000378:metabolism; D013053:Spectrophotometry; D014801:Vitamin A
D012168:Retinal Pigments; D014801:Vitamin A