Schematic representation of FhuA Δ1-159 Ext (top) and FhuA Δ1-159 (bottom) within triblock copolymer PIB
membranes. Membrane structure was obtained by Molecular Dynamics calculations (see Additional File 1). The hydrophobic transmembrane regions of FhuA Δ1-159 Ext (hyrophobic portion: 4 nm) and FhuA Δ1-159 (hydrophobic portion: 3 nm) are indicated with lines; the extended part of FhuA Δ1-159 Ext is indicated by a broken line. Graphical representations obtained by VMD (Visual Molecular Dynamics program ver. 1.6, http://www.ks.uiuc.edu/Research/vmd/).