v v substrate Km V V substrate Km substrate constant Activator constant Activator V E S Km V E S Km S compartment Constant_flux__irreversible v compartment linear_activation constant a compartment Irr_Michaelis_Menten__enzyme__userdefined V b a Km compartment Irr_Michaelis_Menten__enzyme__userdefined V c a Km compartment linear_activation constant a compartment Henri_Michaelis_Menten__irreversible b Km V compartment linear_activation constant a compartment Henri_Michaelis_Menten__irreversible c Km V