1.14.19.2 catalase - 438431 1.14.19.2 catalase 3fold stimulation of purified enzyme, 4-5fold increase of activity in crude extracts 438429 1.14.19.2 catalase 5-10fold stimulation 438427 1.14.19.2 dithiothreitol enhances activity 438424 1.14.19.2 reduced glutathione enhances activity 438424