81.   The virus left surrounding normal cells in mice unharmed.

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

83.   The technology works by detecting from urine the different proteins in cancer cells from normal cells.

84.   Their skin cells, tested in the laboratory, are unable to repair themselves in the way that normal cells do.

85.   They wrote out patent applications covering the use of telomerase in rejuvenating normal cells and in diagnosing and treating cancer cells.

86.   Unlike normal cells, cancer cells are constantly dividing and thus need to make new DNA all the time.

87.   Weeklong experiments so far indicate that the hepatocytes are acting like normal liver cells.

88.   What they found was that normal cells and cells from other sorts of cancers contained the protein in the nucleus.

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

90.   With calcium present, as it would be on a calcium-rich diet, the cells differentiate and mature like normal epithelial cells.