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Proposed two alternative catalytic mechanisms of OleTJE with (monooxygenase-like) or without (peroxygenase-like) redox systems. The Arg245 is proposed to be required for substrate anchoring via the strong electrostatic interactions with the carboxyl group of fatty acid substrate. The supply of two protons in the putative monooxygenase catalytic cycle remains unclear. The dashed arrow indicates the peroxide shunt pathway.
