A b toxin

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 A B toxins are toxins with 2 subunits, A and B. A B toxins are normally secreted by pathogenic bacteria. the A subunit is known as the 'active' subunit, because this subunit uses enzymes to interfere with proteins in the host cell. This interference can cause proteins to become inactive. The B subunit is known as the 'binding' subunit, because this subunit binds to receptors on the host cell[1].


  1. A B toxins are toxins with 2 subunits, A and B. A B toxins are normally secreted by pathogenic bacteria. The A subunit is known as the 'active' subunit, because this subunit uses enzymes to interfere with proteins in the host cell. this interference can cause proteins to become inactive. The B subunit is known as the 'binding' subunit, because this subunit binds to receptors on the host cell

Gary E. Kaiser (2014), Doc Kaisers Microbiology Home Page. Avalible from; http://faculty.ccbcmd.edu/courses/bio141/lecguide/unit3/bacpath/abtox.html [Accessed: May 2014]

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