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C. atrox venom contains metalloproteinase activity that is inhibited by C. atrox serum. (A) Ten micrograms (µg) of whole C. atrox venom preincubated in the presence (+) or absence (−) of 1 mM EDTA was assayed for proteolysis of a collagen substrate (Azocoll). The presence of EDTA in the reaction abolishes detectable metalloproteinase proteolysis of collagen. (B) Whole-venom proteolysis of collagen is inhibited by C. atrox serum. Error bars indicate standard deviation.
