While the receptors for VIP (VIRP 1 and 2) and PACAP (ADCYAP1R1) share homology, they differ in their substrate specificities and expression patterns.
Mada su receptori za VIP (VIRP 1 i 2) i PACAP (ADCYAP1R1) homologni, oni se razlikuju u pogledu supstratnih specifičnositi i obrazaca izražavanja.