When coagulated with chymosin, casein is sometimes called paracasein.
From the en.wikipedia.org
The US followed with chymosin, a milk-clotting enzyme made by genetically engineered bacteria.
From the newscientist.com
Chymosin or rennin is an enzyme found in rennet.
From the en.wikipedia.org
Bovine chymosin is now produced recombinantly in E. coli, Aspergillus niger var awamori, and K. lactis as alternative resource.
From the en.wikipedia.org
Chymosin is produced by gastric chief cells in infants to curdle the milk they ingest, allowing a longer residence in the bowels and better absorption.
From the en.wikipedia.org
More examples
Rennin: an enzyme that occurs in gastric juice; causes milk to coagulate
Chymosin or rennin is an aspartic acid protease enzyme found in rennet. It is produced by cows in the lining of the abomasum (the fourth and final, chamber of the stomach). ...
An enzyme that clots milk; it is used in the manufacture of cheese.