Fig. 3From: Identification of a major facilitator superfamily protein that is beneficial to L-lactic acid production by Bacillus coagulans at low pHConstruction of the mfs gene heterogeneous expression vectors and detection of mfs gene expression. A diagram of mfs gene heterogeneous expression vectors; B PCR of mfs gene and its native promoter; C detection of mfs gene expression by qRT-PCRBack to article page