Comparative analysis of the extent of disorder caused in the structure of PFTs by the presence of lipids. (A) Cryo-EM map of anthrax toxin (Electron Microscopy Data Bank accession no. EMD-6224) placed on a cartoon lipid bilayer shows disorder in the transmembrane channel amino acid residues. (B) Cryo-EM map of lysenin toxin (Electron Microscopy Data Bank accession no. EMD-8015) placed on a cartoon lipid bilayer shows disorder in the transmembrane channel amino acid residues. (C) Density map of lysenin pore (PDB accession no. 5EC5) crystal structure shows disorder in the transmembrane channel amino acid residues. (D) Cryo-EM map of the completely lipid membrane–embedded VCC shows disorder in the last eight amino acids of the β-barrel.