Omp28 is a 28-kDa outer membrane protein from Porphyromonas gingivalis. Omp28 is thought to be a surface adhesion/receptor protein. Omp28 is expressed in a wide distribution of P.gingivalis strains [1].

1: Characterization and expression of a novel Porphyromonas gingivalis outer membrane protein, Omp28. Slakeski N, Margetts M, Moore C, Czajkowski L, Barr IG, Reynolds EC; Oral Microbiol Immunol. 2002;17:150-156. PMID:12030966