AB toxins

AB toxins definition

Bacterial exotoxins consisting of two polypeptides. (Microbiology: An Introduction by Tortora, Funke, and Case)

Exotoxins composed of two parts (A and B). The B portion is responsible for toxin binding to a cell but does not directly harm it; the A portion enters the cell and disrupts its function. (Prescott’s Microbiology)