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A. Canonical flagellin model from Salmonella enterica serovar Typhimurium with D0, D1, D2, and D3 domains (PDB: 1UCU) [9]. B. Caulobacter crescentus FljM flagellin model with D0 and D1 domains, and lacking D2 and D3 domains (PDB: 8UXN) [21].
