Fig. 7From: Soluble versions of outer membrane cytochromes function as exporters for heterologously produced cargo proteinsCellulase activity of different MtrF fusion proteins. The negative controls (supernatants from wild type and MtrFsol expressing cells) did not reveal any activity. The supernatant from cells expressing the cellulase only with a Sec-leader sequence for export in the periplasm (Cs) shows a rather low activity, whereas MtrF-coupled constructs are up to 3–5 times more activeBack to article page