(DNCB) irreversibly inhibits mammalian thioredoxin reductase (TrxR) in the presence of
NADPH, inducing an NADPH oxidase activity in the modified enzyme (Arnér, ESJ,
Björnstedt, M., and Holmgren, A.(1995) J. Biol. Chem. 270, 3479–3482). Here we have
further analyzed the reactivity with the enzyme of DNCB and analogues with varying
immunomodulatory properties. We have also identified the reactive residues in bovine …