Ribbon diagram of the 3-dimensional model of the soluble form of human b5R.

The crystal structure of the solubilized form of pig liver b5R11 served as the template. The FAD-binding domain is drawn in orange, the NADPH-binding domain in blue, FAD in yellow, NADPH in red, and the mutated residues giving rise to methemoglobinemia type I in white. The schematic ribbon diagram was generated with RIBBONS.57