Fig. 4From: Coproduction of menaquinone-7 and nattokinase by Bacillus subtilis using soybean curd residue as a renewable substrate combined with a dissolved oxygen control strategyPareto chart showing the effects of different components on the biosynthesis of MK-7 (a) and NK (b). The tick labels indicate soybean curd residue (a), maltose (b), lactose (c), sucrose (d), beef extract (e), soya peptone (f), fish peptone (g), K2HPO4 (h), and MgSO4 (j)Back to article page