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Domain arrangement of Haemophilus influenzae autotransporters. Autotransporters contain three general domains: a signal peptide (green), a passenger domain (blue), and an outer membrane β-barrel domain (red). Within the passenger domains, binding domains are represented in pale blue, and protease domains are represented with diagonal lines. Asterisks (*) indicate regions of autoproteolysis, and SAAT refers to self-associating autotransporter.
