Additional In Vitro and In Vivo Evidence for SecA Functioning as Dimers in the Membrane: Dissociation into Monomers Is Not Essential for Protein Translocation in Escherichia coli

Hongyun Wang, Bing Na, Hsiuchin Yang and Phang C. Tai

Journal of Bacteriology 190 ( 4 ): 1413 - 1418 , 2008