3.4.23.29 additional information - the enzyme is the least heat-stable among the milk-clotting enzymes 3.4.23.29 30 - pH 4.6, 15 min, stable 3.4.23.29 45 - pH 4.6, 15 min, complete inactivation 3.4.23.29 50 - pH 4.5, 15 min, stable up to 3.4.23.29 60 - pH 4.5, 15 min, complete inactivation