showed that renneted recon-stituted milk protein concentrate had a lower rennet coagulation time (RCT) and increased gel firmness (as measured byG0, the storage modulus, after 45 min) when reconstituted in water containing 2.72 mM calcium chloride. Furthermor e,coagulation occurs at a lower level of j-casein hydrolysis with added calcium. Similarly, calcium chloride is routinelyadded during the manufacture of renneted cheeses todecrease the RCT and increase curd firmness. Additions upto 10 mM decreased RCT and incre ased gel strength, buthigh additions (>100 mM) had the opposite effect