Chymosin:
Renment is the stomach extract that contains the enzyme chymosin in a stabilized form that is usable for cheese making -> chymosin that is required for cheese making is very small.
Chymosin is highly sensitive to shaking ,heat light, alkali,dilutions ,and chemicals.
Milk is coagulated by chymosin in to a smoath gel capable of extruding whey at a uniformly rapid rate.
Chymosin concentration affects gel firmness.