“…In order to purify the enzyme, a new, simplified method is required. The catalase enzyme is distributed widely in animals (Dounce and Frampton, 1939;Deisseroth and Dounce, 1969;Sarkar and Sumner, 1951;Sumner and Dounce, 1937) and plants (Schiefer et al, 1976), including microorganisms (Herbert and Pinsent, 1947;Kamel and Tahany, 1973) and is said to have common antigens (Higashi et al, 1965). Thus, an anti-catalase serum produced from the catalase of a given animal should cross-react with catalase from other species to precipitate.…”