31.   In the case of a potential cancer killer, the trick is to ferret out drugs that kill a range of cancer cells but leave healthy cells unharmed.

32.   Infectious agents are fooled into latching onto the carbohydrates instead of onto healthy cells and are then carried out of the body.

33.   It also plays a role in tricking healthy cells into letting the bacteria invade them.

34.   It blends with healthy cells until it can mount an attack in the form of a tumor or lesion.

35.   It works by using toxins, drugs coupled with monoclonal antibodies, that promise to destroy cancerous cells in tumors without adversely affecting nearby healthy cells.

36.   Millennium researchers think that healthy cells can better recover from proteasome inhibition than tumor cells, though that will have to be proved in larger clinical trials.

37.   Measuring which genes are turned on in a tumor cell but not a healthy cell, for instance, could provide clues to the causes of cancer.

38.   Most drugs are indiscriminate, killing healthy cells along with diseased cells.

39.   Neupogen has been shown to stimulate the production of healthy immune cells.

40.   Once triggered, prostate cancer cells, like healthy prostate cells, require male sex hormones to survive.