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Araujiain aII, the protease with highest specific activity purified from latex of Araujia angustifolia (Apocynaceae), shows optimum proteolytic activity at alkaline pH, and it is completely inhibited by the irreversible inhibitor of cysteine proteases trans-epoxysucciny-l-leucyl-amido(4-guanidino) butane. It exhibits esterolytic activity on several N-α-Cbz-amino acid p-nitrophenyl esters with a preference...
Latices from Asclepias spp are used in wound healing and the treatment of some digestive disorders. These pharmacological actions have been attributed to the presence of cysteine proteases in these milky latices. Asclepias curassavica (Asclepiadaceae), “scarlet milkweed” is a perennial subshrub native to South America. In the current paper we report a new approach directed at the selective biochemical...
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