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. 2019 Jan 28;18:17. doi: 10.1186/s12934-019-1066-4

Fig. 2.

Fig. 2

Comparison of rhFGF21 gene expression with different promoters. a SDS-PAGE analysis of rhFGF21 expressed in the cytoplasm of B. subtilis following 24 h incubation. The molecular weight of mature rhFGF21 is about 27 kDa. Column M: molecular weight marker. The strain B. subtilis 1A751C served as negative control. b The relative densitometric analysis for rhFGF21 expression level in different B. subtilis strains