Figure 1

Crystal structures and cofactor distances of mammalian and bacterial XORs.
(a) Crystal structure of bovine milk XOR (bXOR) as a homodimer. (b) Crystal structure of Rhodobacter capsulatus XOR (RcXOR) as a heterotetramer. Subunits are shown in different colors. (c)–(d) Cofactors of each XOR selected interatomic distances are shown for bXOR, (c) and RcXOR (d). All the structures were illustrated by PyMol from the protein data bank codes 1FO4 and 1JRO.