<p>The subunit interface is rendered by van der Waals surface using the colors; green for chain A, blue for chain B, and <i>red</i> for 211 (W or A) that is found in chain B. The arrows indicate the residues that change conformation upon W211A mutation in (A) chain A and (B) chain B. The representation in (A) has been rotated 180° around the left diagonal axis to obtain (B), and the snapshots were taken from the simulations performed at 75°C.</p
