NCIt definition : A single chain chimeric protein consisting of a monoclonal antibody fragment attached
to a portion of the Pseudomonas exotoxin A. LMB-7 immunotoxin attaches to B3, a Lewis
Y-related carbohydrate epitope on some solid tumor cells. The antibody attaches to
the cell and the exotoxin inhibits protein synthesis by inactivating elongation factor
2. (NCI04);
Alternative definition : NCI-GLOSS: A toxic substance linked to an antibody that attaches to tumor cells and
kills them.;