Partial purification of polypeptides activating catalase in Saccharomyces cerevisiae

In a previous paper the existence of an activating factor for catalase biosynthesis in Saccharomyces cerevisiae was reported. The partial purification of this factor by ammonium sulphate precipitation and chromatography is described. Several fractions with different molecular weights manifesting catalase activity in repressed cultures of S. cerevisiae were obtained, and are discussed.