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Structural image of the cholesterol-dependent cytolysin Perfringolysin O (PDB file: 1PFO;15). Perfringolysin O shares a sequence identity of 42% to LLO for the whole polypeptide chain and of 64% for the C-terminal domain D4.13 In black, the conserved sequence consisting of 11 amino acids including the singular cysteine (spheres) is shown.
