Abstract
IT is known that a free radical appears when old yellow enzyme is reduced with triphosphopyridine nucleotide1. Flavin mono nucleotide (FMN) has been shown to give a free radical when reduced by dithionate or by a solution of zinc in hydrochloric acid2,3, and it is believed that this radical, which is of the semiquinone type, is related to the radical produced in the enzymatic reduction.
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ORR, J. An Electron Spin Resonance Examination of Molecules related to the Isoalloxazine Ring System. Nature 201, 816–817 (1964). https://doi.org/10.1038/201816a0
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DOI: https://doi.org/10.1038/201816a0
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