Fig. 5From: Soluble versions of outer membrane cytochromes function as exporters for heterologously produced cargo proteinsWestern blot of different MtrF variants. a Concentrated supernatant, b periplasmic fraction of the MtrF versions. Only in the MtrFsol and the MtrFsolΔ22–182 strains a signal can be detected in the supernatant and the periplasm, respectivelyBack to article page