Figure 4. SDS-PAGE analysis of the different incubation mixtures after incubation: Mucin (lane 1); Mucin, β-galactosidase (lane 2); Mucin, P. gingivalis (lane 3); Mucin, β-galactosidase, P. gingivalis (lane 4); Mucin, β-galactosidase, P. gingivalis, p-APTG (lane 5); Mucin, β-galactosidase, P. gingivalis, glucose (lane 6). Arrow indicates mucin bands.