21.   The mitomycin C is a well-known chemotherapy agent that attacks dividing cells by entangling their DNA strands with chemical cross-links.

22.   The virus infects and multiplies in cancer cells but does not attack normal cells.

23.   White blood cells also play a role in attacking cancerous cells.

24.   Xanelim is a modified antibody that discourages the immune system from attacking skin cells.

25.   But eventually, scientists may be able to develop drugs that will attack cells bearing this defective gene while ignoring other cells, Vogelstein said.

26.   Everybody experiences this so-called oxidative damage from free radicals, byproducts of metabolism that attack cells.

27.   He said such a vaccine would, in effect, educate the immune system not to attack pancreatic cells that have the GAD gene.

28.   It could either attack the cell it lives in or remain dormant until something triggers it to emerge again.

29.   Instead of seeking to limit growth of these blood vessels, it directly attacks the cells lining the blood vessels.

30.   Low grade T-cell lymphoma is a cancer of the lymph glands that weakens the immune system by attacking cells that fight disease.