Diphtheria toxin-It is AB toxin. It inhibits protein synthesis
in the host cell through phosphorylation of the eukaryotic
elongation factor 2, which is an essential component for protein
synthesis.
Exotoxin A of pseudomonas aeruginosa- It is also example of an
AB toxin that targets the eukaryotic elongation factor 2.
AB5 toxins- It is also type of AB toxin, characterized by B
pentamers. Less commonly, the term "AB toxin" is used to emphasize
the monomeric character of the B component.