Fig. 7
From: Isolation and production optimization of a novel milk-clotting enzyme Bacillus velezensis DB219
The effects of volume (A and B) and initial pH (C and D) of fermentation medium on DB219 MCE production during different fermentation times (12–60 h). The medium composition was wheat bran (60 g/L), soluble starch (12.5 g/L) and corn steep liquor (3 g/L). a−d Values in the same row with different superscripts are significantly different (P < 0.05). The data are represented as mean ± SD (n = 3)