Porphyromonas gingivalis has two types of lipopolysaccharide (O-LPS and A-LPS).
Type IX secretion substrate proteins bind to anionic O polysaccharide of A-LPS.
A final product of Wbp pathway may be involved in anionic O polysaccharide of A-LPS.
Many genes contributing to LPS synthesis have been characterized in P. gingivalis.