Fig. 4.

Structure comparison between Trp-ring domains. (a) Stereo ribbon diagram of the superimposed W1 (blue), W3 (green), and W5 (red) domains viewed from the side. (b) Stereo ribbon diagram of the superimposed Trp-ring domains viewed from the top. (c) Sequence alignment of the Trp-ring domains between Hia/Hsf/NhhA. In (a) and (b), the conserved residues at the trimeric interface are shown in stick representation. In (c), these residues are shown in blue.