catalase enzymes derived from bacteria from the genera alcaligenes and microscilla are disclosed . the enzymes are produced from native or recombinant host cells and can be utilized to destroy or detect hydrogen peroxide , e . g ., in production of glyoxylic acid and in glucose sensors , and in processes where hydrogen peroxide is used as a bleaching or antibacterial agent , e . g . in contact lens cleaning , in bleaching steps in pulp and paper preparation and in the pasteurization of dairy products .