Diphtheria Toxin, Diphtheria-related Fusion Protein Toxins, and the Molecular Mechanism of Their Action Against Eukaryotic Cells -- Anthrax Toxin and Genetic Aspects Regulating its Expression -- Shiga Toxins and Their Mechanisms of Cell Entry -- Cholera Toxin: Mechanisms of Entry Into Host Cells -- ExoU: A Cytotoxin Delivered by the Type III Secretion System of Pseudomonas aeruginosa -- Staphyl…