Fig. 1. Interaction of SecA with acidic phospholipids containing membranes. (A) Surface plasmon resonance experiments of SecA binding to a supported lipid bilayer made of E. coli lipids examined at a KCl concentration of 200 mM. Fit (blue line) represents the sum of abundances in state 1 and 2. (B) As in (A) but at 50 mM KCl. (C) As in (A) but at 10 mM KCl. (D) Sketch of the two state model that best fit the SPR sensorgrams.
