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. 2006 Dec 26;5(1):e7. doi: 10.1371/journal.pbio.0050007

Figure 5. Conformational Changes in the TM Region of AcrB.

Figure 5

(A) Wire model of the superpositioned TM domains of subunit A and subunit C viewed from the periplasmic side. Subunit B is omitted since it displays a similar conformation as subunit A. The individual helices are labeled.

(B) Detailed interactions of the amino acid residues in the putative proton-translocation site viewed in the same orientation as in (A). Residues involved in the hydrogen-bonded network (dashed lines) are labeled. The |Fo-Fc| omit electron density map (blue mesh) of Lys940 in subunit C is contoured at 3.5 σ.