Fig. 6
From: Isolation and production optimization of a novel milk-clotting enzyme Bacillus velezensis DB219
The effects of different soluble starch (optimal carbon source) concentration (A, B) and corn steep liquor (optimal nitrogen source) concentration (C, D) on DB219 MCE production during fermentation (12–60 h). a−d Values in the same row with different superscripts are significantly different (P < 0.05). Data were presented as means of triplicate measurements; Error bars were standard deviations. The data are represented as mean ± SD (n = 3)