A-B toxin

A-B toxin

[¦ā¦bē ′täk·sən]
(biochemistry)
A toxin found in some bacteria and plants that is composed of two functionally distinct parts termed A, the enzymatically active portion, and B, the receptor binding portion; it can catalyze chemical reactions inside animal cells.
References in periodicals archive ?
The complete ricin toxin is a prototypic A-B toxin, in which the B-chain binds to the target cell and the A chain enters cells and causes disruption of protein synthesis resulting in cell death.