immunotoxin

(IH-myoo-noh-TOK-sin) An antibody linked to a toxic substance. Some immunotoxins can bind to cancer cells and kill them.

Protein drugs consisting of an antibody joined to a toxin molecule. Made by either chemically linking the molecules, or by fusing the genes for the toxin and the antibody, and expressing a fusion protein. The antibody portion of the molecule targets the toxin.