title: Evidence for a sensitising pigment in fly photoreceptors.
abstract: Many photoreceptor cells in invertebrates have a dual-peak spectral sensitivity. Evidence is presented that in fly photoreceptors the ultraviolet peak is due to a photostable pigment that absorbs light quanta and transfers the energy to the blue-absorbing visual pigment.
mesh_terms: D000818:Animals; D004175:Diptera / Q000502:physiology*; D004735:Energy Transfer; D008954:Models, Biological; D010786:Photoreceptor Cells / Q000502:physiology*; D012168:Retinal Pigments / Q000502:physiology*; D012243:Rhodopsin / Q000502:physiology; D013056:Spectrophotometry, Ultraviolet; D014785:Vision, Ocular; D014802:Vitamin A Deficiency / Q000503:physiopathology
chemical_list: D012168:Retinal Pigments; D012243:Rhodopsin