title: Influenace of melatonin and its precursors on the pigment cells of planaria (Dugesia lugubris).
mesh_terms: D000818:Animals; D066298:In Vitro Techniques; D008550:Melatonin / Q000494:pharmacology*; D010858:Pigmentation / Q000187:drug effects*; D010932:Planarians / Q000166:cytology / Q000187:drug effects*; D012701:Serotonin / Q000494:pharmacology; D014363:Tryptamines / Q000494:pharmacology; D014419:Turbellaria / Q000187:drug effects*
chemical_list: D014363:Tryptamines; D012701:Serotonin; D008550:Melatonin