Evidence for a bistable photopigment contained in barnacle median photoreceptor.
D000200:Action Potentials; D000818:Animals; D003624:Darkness; D010775:Photic Stimulation; D010786:Photoreceptor Cells / Q000502:physiology*; D012168:Retinal Pigments / Q000502:physiology*; D001468:Thoracica / Q000502:physiology*; D013997:Time Factors
D012168:Retinal Pigments