Fig. 5. Ribbon diagrams of LpxA. The left ribbon diagram is a monomer of LpxA (262 amino acids). The left-handed b-helix is present the bottom three fourths of the protein. The right ribbon diagram shows the native homotrimer, viewed from the bottom. The active sites are located between the subunits just above the loop-outs. Note the precise stacking of the coils of the b-helix on top of each other. Rotate the monomer and carefully inspect the b-helix in LPXA. See Fig. 1 for Chime Plug-In downloading instructions.