Targets vasopressin-oxytocin related receptors. Expressed by the venom duct. Is present in all duct parts with a highest content in the proximal part (part 1) (27%), part 2 (29%), and the distal part (part 5) (26%). The cysteine framework is C-C. Belongs to the vasopressin/oxytocin family. According to a report, a hydroxyproline is present at position 8 (PubMed:22709442). According to other publications, a hydroxyproline is present at position 7 (PubMed:19380747, PubMed:23031820).