. "Catalysis of the hydrolysis of any non-peptide carbon-nitrogen bond in a linear amidine, a compound of the form R-C(=NH)-NH2." . . "hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in linear amidines" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .