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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 22, Number 11
BKCSDE 22(11)
November 20, 2001 

Paramagnetic Inversion of the Sign of the Interference Contribution to the Transverse Relaxation of the Imido Protons of the Coordinated Imidazoles in the Uniformly 15 N Labeled Cytochrome c3
Andre Kim, In-Chul Jeong, Yoon-Bo Shim, Shin-Won Kang, Jang-Su Park
Desulfovibrio vulgaris Miyazaki F (DvMF), Imido proton, HMQC, 15N-Labeled cytochrome c3.
In the spectrum of uniformly 15N labeled cytochrome c3, the relative linewidths of the doublet peaks of the 15N-coupled imido proton of the coordinated imidazole group were reversed on oxidation. This inversion was explained by the interference relaxation process between the electron-proton dipolar and 15N-1H dipolear interactions. The inversion can be used to assign the imido protons of the coordinated imidazole groups in heme proteins.
1197 - 1201
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