Ariadne Genomics Inc. vasopressin signaling pathway via receptor type 2 G protein mediated signaling pathway via Galphas family vasopressin signaling pathway via receptor type 1 G protein mediated signaling pathway via Galphaq family protein kinase A (PKA) signaling pathway Avpr1a Avpr2 vasoconstriction autonomic functions protein kinase A (PKA) signaling pathway --+> Aqp2 expression Avp Aqp2 expression ---> water reabsorption Aqp2 translocation ---> water reabsorption protein kinase A (PKA) signaling pathway --+> Aqp2 translocation Aqp2 expression Aqp2 translocation Avpr2 --+> protein kinase A (PKA) signaling pathway Avpr1a --+> vasoconstriction Avp ---- Avpr2 Avp ---- Avpr1a water reabsorption second messengers generation [Ca] elevation behavioral effects