
Keywords: WLS; Wntless; MOR; mu-opioid receptor; LC; locus coeruleus; NE; norepinephrine; DAMGO; [d-Ala2, N-Me-Phe4, Gly-ol5]-enkephalin; TH; tyrosine hydroxylase; GPCR; G-protein coupled receptor; GIP; G-protein interacting protein; MORIP; mu-opioid receptor inter