the accessible area of the substrate to the enzyme. The second approach used an aqueousmedium, in which carnosine was totally solubilized, and aimed to evaluate the ability of an acyltransferase to catalyze acylation of the peptide. The enzymatic acylation of carnosine in anhydrous organic solvent was catalyzed by lipase B from Candida antarctica . The size of carnosine particles was decreased significantly