Surface protein of a Streptococcus agalactiae isolate
- PMID: 381197
- PMCID: PMC414353
- DOI: 10.1128/iai.24.3.637-641.1979
Surface protein of a Streptococcus agalactiae isolate
Abstract
A Streptococcus agalactiae isolate of bovine origin was cultured in broth; log-phase cells were washed and radioiodinated and subsequently extracted at low pH in the presence of a nonionic detergent. A protein antigen was purified from concentrated extract by ultracentrifugation, gel filtration, and ion-exchange chromatography. The molecular weight of the protein was estimated at 31,800. The agglutinogenic character of the protein indicated its localization at the cell surface.
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