P. Panayotov, K. Yoanidu, P. Boyanova, B. Milenkov Abstract. A study of rennet coagulation of cow’s milk was conducted using chymosin of microbial and camel origin in the range 10 to 60 cm3.10-2 dm-3 with an equivalent activity to 1:50000. As a control calf chymosin was used. Th