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. 2020 May 6;20:109. doi: 10.1186/s12866-020-01798-4

Fig. 3.

Fig. 3

Growth curves of REL606 expressing hpaB variants in defined medium with 4HPA (a) or 3HPA (b) as sole carbon source. E. coli REL606 cells harboring expression constructs BL21(DE3)-derived hpaB [pHCE-IIB-HpaB(R379), Inline graphic]; REL606-derived hpaB [pHCE-IIB-HpaB(C379), Inline graphic]; mutant hpaBs [(pHCE-IIB-HpaB(G379), Inline graphic]; and pHCE-IIB-HpaB(S379), Inline graphic]. REL606 harboring the control plasmid (pHCE-IIB, Inline graphic) was used as control. The culture medium comprised defined medium supplemented with 0.76 g/L (5 mM) of 3HPA or 4HPA. Error bars denote standard deviation of the mean from three independent cultures