Fig. 4
From: Citrullination mediated by PPAD constrains biofilm formation in P. gingivalis strain 381
Deletion of the gene encoding PPAD results in increased matrix production. 381 and Δ8820 colony biofilms grown on plates were imaged by Cryo-SEM. Bacterial cells were visible on the surface and within 381 colony biofilms. The surface of Δ8820 colony biofilms were smooth and cells within the biofilms were coated or encased in a matrix-like substance. Scale bar: (top left) 10 µm, (top middle) 5 µm, (top right) 1 µm, (bottom left) 20 µm, (bottom middle) 20 µm, (bottom right) 2 µm
