MELYTALLAVTILSPSSIVGLPGECSVNVIPKKNLDKAKFFSGTWYETHYLDMDPQATEKFCFSFAPRESGGTVKEALYHFNVDSKVSFYNTGTGPLESNGAKYTAKFNTVDKKGKEIKPADEKYSYTVTVIEAAKQSALIHICLQEDGKDIGDLYSVLNRNKNALPNKKIKKALNKVSLVLTKFVVTKDLDCKYDDKFLSSWQK NP7_RHOPR Nitrophorin-7 Binds to negatively charged cell surfaces of activated platelets; binds to L-a-phosphatidyl-L-serine (PS)-bearing phospholipid membranes. Once bound on an activated platelet, NP7 releases its stored nitric oxide gas (NO) into the victim's tissues while feeding, resulting in vasodilation and inhibition of platelet aggregation. Also acts as an anticoagulant by blocking coagulation-factor binding sites. Has antihistamine activity; binds histamine with high affinity. 205