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Dictionary of molecular biology
1 2 4 7 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
AB toxin

Multi-subunit toxin in which there are two major components, an active (A) portion and a portion that is involved in binding (B) to the target cell. The A portion can be effective in the absence of the B subunit(s) if introduced directly into the cytoplasm. In the well-known examples, the A subunit has ADP-ribosylating activity. See cholera toxin, diphtheria toxin, pertussis toxin.

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