title: On the possibility of protein-chromophore charge transfer in visual pigments.
mesh_terms: D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004579:Electron Transport; D005136:Eye Proteins / Q000378:metabolism*; D012168:Retinal Pigments / Q000378:metabolism*
chemical_list: D005136:Eye Proteins; D012168:Retinal Pigments