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Infect Immun. 1989 November; 57(11): 3265-3269

Surface location of a Bacteroides gingivalis glycylprolyl protease.

Department of Microbiology, University of British Columbia, Vancouver, Canada.

ABSTRACT

Various immunological methods were used to localize a glycylprolyl protease previously isolated from Bacteroides gingivalis ATCC 33277. The results obtained by enzyme-linked immunosorbent assay, indirect immunofluorescence staining, and indirect immunogold labeling suggest that the glycylprolyl protease is present on the surface of the cell outer membrane and is specific to B. gingivalis strains. The enzyme was removed from the cell envelope by treatment of the whole cells with sodium dodecyl sulfate, Triton X-100, sodium deoxycholate, and proteinase K.

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