echistatin, a1 isoform

Potent irreversible αVβ3 integrin antagonist (Ki = 0.27 nM). Disrupts attachment of osteoclasts to bone and inhibits bone reabsorption (IC50 = 0.1 nM). Prevents ADP-induced platelet aggregation via inhibition of glycoprotein IIb IIIa (GpIIb IIIa, αIIbβ3)