The ratio of the milk-clotting activity (MCA) and proteolytic (PA) was compared for enzyme preparations (MEP) based on recombinant chymosin, chymosin animal origin microbial origin. MCA value measured in international units (IMCU), PA determined by Anson method substrate from hemoglobin at 30 °C рН 5.3. It found that chymosins had highest level MCA/ PA: group with < ~1000 includes MEPs Chy-m...