Three-dimensional structures of heme proteins with "CP" motifs. (A) 3CQVA; (B) 2CIWA; (C) 1GIWA; and (D) 2PBJA. The CP dipeptides are shown as red sticks. The immediate downstream structures of the CP dipeptides are shown in blue.
Li et al. BMC Structural Biology 2011 11:13 doi:10.1186/1472-6807-11-13