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Carbon-2 proton exchange at histidine-41 in bovine erythrocyte superoxide dismutase.


ABSTRACT: The C-2 proton of one histidine residue in bovine erythrocyte superoxide dismutase is shown to be particularly labile. This residue is identified by tritiation, protein digestion and subsequent peptide 'mapping' as histidine-41. A half-life for the exchange of histidine C-2 1H for 2H in 2H2O as solvent, at pD 8.1 and 40 degrees C, is estimated as approx. 9.2h, by 1H nuclear-magnetic-resonance spectroscopy.

SUBMITTER: Cass AE 

PROVIDER: S-EPMC1164943 | biostudies-other | 1977 Sep

REPOSITORIES: biostudies-other

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