Greenberg and associates (2, 3) in pigeon liver homogenates and was later found in a variety of bacterial species, including Clostridium cylindrosporum (4), Micrococcus aerogenes (5), and others (6). The enzyme has been purified from acetone powders of pigeon liver (7), from Micrococcus aerogenes (6), and from Clostridium cylindrosporum (8, 9). This paper describes the purification of the enzym...