A note concerning acetate activation of peroxidative activity of catalases using 2,2'-azino-bis(3-ethylbenzthiazoline)-6-sulfonic acid as a substrate.

Beef liver catalases showed peroxidative activity using 2,2'-azino-bis-(3-ethylbenzthiazoline)-6-sulfonic acid as the electron donor and hydrogen peroxide as the acceptor at a pH of 5. This activity was not observed at pH 7. The reaction depended on acetate concentration, although succinate and propionate could partly replace the acetate as a catalyst.