The RMSD values of PRC-DD solution and crystal structures under different alignment conditions.
(a) aligning a single monomeric unit. (b) aligning the whole homodimeric structures of PRC1-DD. (c) aligning a single monomeric unit in the homodimer. Residue number 1–67 denote the first monomeric unit, while 67–134 denote the second monomeric unit.