ArticleBiochemical and biophysical research communications2007
Arthromyces ramosus peroxidase produces two chlorinating species.
Article in Biochemical and biophysical research communications, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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2 authors at 1 institution in 1 country.
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Abstract
We previously reported that the hemes of horseradish peroxidase (HRP) and Arthromyces ramosus peroxidase (ARP) undergo vinyl and meso-carbon modifications when the enzymes oxidize chloride ion. Here we demonstrate for ARP that, although both modifications exhibit the same pH profile with an optimum at approximately pH 4.0, monochlorodimedone suppresses the vinyl but not meso-carbon modifications. Furthermore, meso-chlorination occurs when ARP reacts with exogenous HOCl, implicating an Fe(III)-O-Cl intermediate in the reaction. These results establish that (a) the chloro species involved in meso-modification differs from that which reacts with the vinyl groups, (b) equilibration of the vinyl modifying species (HOCl) into the medium occurs more rapidly than vinyl group modification, and (c) the oxidation of chloride by ARP produces two reactive species: HOCl, which adds to the heme vinyl but not meso-positions, and a distinct second species that adds to the meso-carbon.
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