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. 1975 Sep;8(3):238–242. doi: 10.1128/aac.8.3.238

Biochemical Properties of a Penicillin Beta-Lactamase Mediated by R Factor from Bordetella bronchiseptica

Satoshi Yaginuma *, Nobuyuki Terakado , Susumu Mitsuhashi
PMCID: PMC429300  PMID: 241286

Abstract

The β-lactamase specified by an Rte16 plasmid in Bordetella bronchiseptica was purified 200-fold by carboxymethyl-Sephadex column chromatography and electrofocusing. The enzyme has a molecular weight of 46,000 ± 3,000 and an isoelectric point of 8.3 and was highly active against phenethicillin, oxacillin, and propicillin. The enzyme activity was inhibited by sodium chloride but not by ferrous ion. The maximal enzyme activity to benzylpenicillin was observed at pH 7.0 to 7.5 and at 40 C. It is concluded that this enzyme is different from the R-mediated β-lactamases, i.e., the type I and type II β-lactamases which have been classified in previous papers.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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