By using the graphic theory the constant of reserve hydrolytic protein reaction catalyzed by papain have been calculated as follow: For the activation reaction: VM = × 10-6 , k2 = × 10-1 .sec-1 , Ks = 1,79 × 10-4 M, = , KA = × 10-4 M. For the inhibition reaction: VM = × 10-3 , Ks = × 10-5 M, k2 = sec-1 , Ki = × 10-3 M.