FIG 1.

Antisera to the SgHU protein recognize DNABII proteins from additional oral streptococci. (A) Alignment of S. gordonii HU (SgHU), S. oralis HU (SoHU), and S. mitis HU (SmHU) sequences. Amino acid differences from the S. gordonii sequence are shaded. Sequences were aligned using the ClustalW program. (B) Western blot analysis of 1, 10, and 15 μg of soluble cell extracts of S. oralis, S. mitis, and SgHU protein probed with anti-SgHU, demonstrating the cross-reactivity of anti-SgHU antiserum with the DNABII proteins from the two bacteria.