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disintegrin

n. (context biochemistry English) Any of a family of polypeptides, isolated from venom, that interact with integrin proteins and inhibit the clumping of platelets

Wikipedia
Disintegrin

Disintegrins are a family of small proteins (45–84 amino acids in length) from viper venoms that function as potent inhibitors of both platelet aggregation and integrin-dependent cell adhesion.