autoisolysin

An antibody that in the presence of complement causes lysis of cells in the individual in whose body the lysin is formed, as well as in others of the same species.

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au·to·isol·y·sin (aw″to-i-solґĭ-sin) autoantibody that causes complement-dependent lysis of cells in the individual from which it was obtained and in others of the same species.