Comparison of cell membrane proteins from gram-negative rods related to periodontitis.

Purification and properties of a 75-kilodalton major protein, an immunodominant surface antigen, from the oral anaerobe Bacteroides gingivalis

“…They also have the advantage of being easily studied because they are abundant in the bacterial cells. Although the outer membrane, its constituent proteins (12,16,17,31), and lipopolysaccharides (4,11,18) in oral Bacteroides species have been studied so far, none of the surface proteins except for fimbriae (3,27) has been purified or thoroughly characterized in B. gingivalis.…”