RECOMBINANT CALF-CHYMOSIN AND A PROCESS FOR PRODUCING THE SAME

摘要

An isolated 1098 base-pair nucleic acid encoding a 366 amino acid calf chymosin is cloned in the E. coli expression vector PET21b, a host cell is transformed with the vector and cultured to produce chymosin, which is recovered in active form following renaturation and purification at low pH.