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  • Title: Purification and partial characterization of neuraminidase from type III group B streptococci.
    Author: Milligan TW, Mattingly SJ, Straus DC.
    Journal: J Bacteriol; 1980 Oct; 144(1):164-71. PubMed ID: 6998945.
    Abstract:
    Extracellular neuraminidase from a type III fresh clinical isolate of a group B streptococcus was purified by a combination of salt fractionation, affinity chromatography of Affi-Gel blue, ion-exchange chromatography on diethylaminoethylcellulose, and gel filtration on Sephacryl S-200. These procedures yielded enzyme which was purified approximately 1,000-fold compared with the enzyme found in the original supernatant fluid. This type III streptococcal neuraminidase had a molecular weight of approximately 125,000 as estimated by filtration on Sephacryl S-200 and approximately 106,000 when analyzed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. In contrast to the majority of other bacterial neuraminidases, the type III group B streptococcal enzyme had no effect on colominic acid or N-acetylneuramin-lactose; however, it was quite active on bovine submaxillary mucin.
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