Commercial levels of chymosin production by Aspergillus. 

 -  Bio/Technology, 9(10), p.976, 1991 .
<br/><br/> We have increased the production of bovine chymosin in Aspergillus niger var. awamori to more than one gram per liter of secreted authentic enzyme by combining a mutagenesis protocol with a novel robotic screening program. Analysis of the superior chymosin producing strains indicated that they have enhanced capabilities to secrete extracellular proteins