Fig. 2: Ultrastructural analysis of four oral cavity symbionts belonging to the Neisseriaceae.
From: Evolution of longitudinal division in multicellular bacteria of the Neisseriaceae family

Schematic representations and electron microscope images of a N. elongata, b A. filiformis, c S. muelleri and d C. steedae. Rightmost panels display extracted sacculi (peptidoglycan) of respective Neisseriaceae. P proximal (host-attached) region of the cell, D distal region of the cell, OM outer membrane, PG peptidoglycan, CM cytoplasmic membrane. Scale bars correspond to 1 µm. The results are representative of at least three independent analyses.