The B-factor distributions of the HBP (3BL2) and non-HBPs (1CW0 and 1E5H). The high B-factors are represented in red while the low value is in blue. The backbones are shown as the traces. In the HBP, the heme group is represented with spheres. The thinner traces mean the lower B-factors both in HBP and non-HBPs. (a) Dehaloperoxidase A. (b) Repair endonuclease. (c) Deacetoxycephalosporin C synthase.