Redox enzymes methylamine dehydrogenase

McIntire,W. S., Wemmer, D. E., Christoserdov, A. Y., and Lindstrom, M. E., 1991, A new cofactor in a prokaryotic enzyme Tryptophan tryptophylquinone as the redox prosthetic group in methylamine dehydrogenase, Science 252 817n824. 

The direct electronic communication of this series of redox enzymes allows their application as bioactive sensing interfaces p-cresol [12], methylamine [14] and fructose [ 15] detection have been reported in the presence ofp-cresol methyl hydroxylase, methylamine dehydrogenase and fructose dehydrogenase, respectively. 

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