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Proposed structure of O2 bound peroxo intermediates for sMMOH (left) and CmlA (right). Structures adapted from PDB codes 1FYZ and 5KIK for sMMOH and CmlA, respectively. Residues shown in red are proposed to shift during the respective catalytic cycles. Atoms in blue are from the peroxo moiety, derived from O2. Some ligands are omitted for clarity.
