Inhibition of human red blood cell N-acetyltransferase.

Acetanilide and derivatives of benzoic acid, benzamide, salicylic acid, and salicylamide were tested as inhibitors of p-aminobenzoic acid N-acetyltransferase partially purified from peripheral blood of three rapid and two slow dapsone acetylator human volunteers. The 50% inhibition point of these compounds does not provide a kinetic basis for differentiating the rapid and slow dapsone acetylator phenotypes.