Figure 1.

(A) Stereoview of the crystal structure of IglC. The structure is colored according to its secondary structure elements: helices (red), strands (yellow), and loops (green). The 13 β-strands are numbered and the helices are labeled A–E (including α-helices A and C and 3₁₀-helices B, D, and E). (B) Superposition of the two monomers in one asymmetric unit. Chains A and B were colored yellow and cyan, respectively. (C) Topology diagram of IglC. Helices are represented as cylinders and β-strands as arrows. The two layers of the β-sandwich are separated by a dashed line. All images were generated with the graphics program PyMOL (DeLano Scientific).