31.   The treatment is based on recent insights into the basic genetics of tumor cells, and in particular the protective genes that are subverted when a cell becomes cancerous.

32.   There are probably many ways that cells can become insulin resistant, Goldfine said.

33.   This K-ras gene initiates production of an abnormal protein that causes lung cells to become malignant.

34.   Vogelstein is widely known for having unraveled the series of genetic changes by which a colon cell becomes cancerous.

35.   When cells become cancerous, the proteins on the surface of the cell change slightly.

36.   Why, then, were they able to make normal rodent cells become cancerous but unable to do the same with human cells?

37.   Without repairs, the damaged cells can become cancerous.

38.   In effect, the injected cells became an active, participating part of the young brain.

39.   Muscle cells become less able to let the hormone guide nutrients through the cell membrane and into the cells.

40.   Results indicate the newly created cells become functional and integrate into the local brain circuitry, the researchers concluded.