7.2.4.4 enzyme inhibited by thiocyanate or hydroxylamine, 50-65% of the original decarboxylase activity is restored by incubation of the extract with ATP in the presence of acetate, and the extent of reactivation increases after incubation with dithioerythritol. Reactivation is also obtained by chemical acetylation with acetic anhydride 7.2.4.4 inhibition of malonate decarboxylase complex by avidin can be partially reversed with an excess of biotin