Comparisons of crystal structures within the same construct. Ribbon views of our previously determined crystal structures (Mol X) of HP67 (red) and H41Y (blue) are shown in (a) and (b). The three crystal structures of HP67 are overlaid for the entire sequence in (c) and for the C-terminal subdomain in (e); the three crystal structures of H41Y are overlaid for the entire sequence in (d) and for the C-terminal subdomain in (f), with Phe47, Phe51 and Phe58 labelled. Blue arrows indicate variations in the alignment. Red, HP67 Mol X; magenta, HP67 Mol A; orange, HP67 Mol B; blue, H41Y Mol X; green, H41Y Mol A; cyan, H41Y Mol B. Graphics were created by MOLMOL (Koradi et al., 1996 ▶).