Fig. 2.

Structures of the Hia_51–166 and Hia_307–422 monomers and trimers. (a) Stereo ribbon diagram of the Hia_51–166monomer. Secondary structures, including helices and strands, are labeled. (b) Stereo ribbon diagram of the Hia_51–166 trimer. The three subunits are shown in magenta, yellow, and orange. (c) Stereo ribbon diagram of the Hia_307–422 monomer. Secondary structures, including helices and strands, are labeled. (d) Stereo ribbon diagram of the Hia_307–422 trimer. The three subunits are shown in the same color scheme as mentioned above.