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Southern blot analyses of P. gingivalis specific genes. Genomic DNA was isolated from each strain; digested with EcoRI, BamHI, and HindIII; and then separated on a 1% agarose gel. After blotting to a nylon membrane, P. gingivalis specific genes were probed with 32P-labeled fimA, sod, and kgp gene fragments from strain ATCC 33277. Lanes: 1, ATCC 33277; 2, HW24D1; 3, 6/26; 4, HG564; 5, HNA-99.
