Fig. 3.

Buried polar residues of the Mrp complex. Polar or charged residues which are buried and conserved are shown as spheres (in main figure) or stick models (Insets). Residues that are both buried and highly conserved (SI Appendix, Fig. S1) are emphasized as larger spheres. Basic residues are shown in blue; acidic residues are in red; His residues are in cyan; other polar residues (Asn, Gln, Ser, Thr, Cys, Tyr, and Trp) are in yellow.