Nitrogenase from Klebsiella pneumoniae. An e.p.r. signal observed during enzyme turnover under ethylene is associated with the iron-molybdenum cofactor.
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ABSTRACT: During turnover at 10 degrees C at pH 7.4 in the presence of ethylene, the MoFe protein of Klebsiella pneumoniae nitrogenase (Kp 1) exhibited an electron-paramagnetic-resonance signal with g-values at 2.12, 1.998 and 1.987. 57Fe isotopic substitution demonstrated that this signal arose from the Kp 1 FeMo-cofactor in an S = 1/2 spin state.
SUBMITTER: Hawkes TR
PROVIDER: S-EPMC1154383 | biostudies-other | 1983 May
REPOSITORIES: biostudies-other
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