title: Pigment migration in the tapetum lucidum of the elasmobranch eye: evidence for a nervous mechanism.
mesh_terms: D000818:Animals; D002829:Choroid / Q000166:cytology* / Q000294:innervation / Q000502:physiology; D002856:Chromatophores; D008543:Melanins / Q000378:metabolism; D008854:Microscopy, Electron; D009411:Nerve Endings / Q000166:cytology*; D012754:Sharks
chemical_list: D008543:Melanins