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. Author manuscript; available in PMC: 2010 Mar 29.
Published in final edited form as: Biochemistry. 2008 Sep 17;47(40):10781–10789. doi: 10.1021/bi800398c

Scheme 1.

Scheme 1

Oxidative Activation of INH by Mycobacterial KatG Results in the Formation of an Isonicotinoyl Radical Which Nonenzymatically Reacts with Intracellular Pyridine Nucleotide Cofactors To Generate the INH–NAD Inhibitory Adduct