Detection of peroxidase activity and its localization in the forespore envelopes of Bacillus cereus.

Abstract

Peroxidase activity was detected in Bacillus cereus when the catalase activity has been inhibited by 1mM sodium azide. The peroxidase level was high in late stationary-phase cells just before the accumulation of dipicolinic acid. Ultracytochemical examination indicated that peroxidase was localized in the envelope around the forespore and in the transverse membrane of the cell.