Noun
an enzyme that occurs in gastric juice; causes milk to coagulate
Source: WordNetThe genetically modified microorganism is killed after fermentation and chymosin isolated from the fermentation broth, so that the fermentation-produced chymosin (FPC) used by cheese producers does not contain a GMO or any GMO DNA. Source: Internet
FPC is chymosin B, so is more pure than animal rennet, which contains a multitude of proteins. Source: Internet