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P. gingivalis ATCC 33277 and W50 have different sialidase activity measurements. (A) Proposed sialic acid-docking in P. gingivalis strains (left panel) ATCC 33277 and (right panel) W50. α-Helix (pink), β-sheets (yellow), coils (white), and sialic acid (red) are shown. β-Propeller domain is indicated by a box. (B) Sialidase activity assay. Results shown are mean±SD with n=3. Statistical analyses were performed using Student's t test (**represents p<0.01).
