111.   Working from this new set of instructions, the chimeric virus then sought out, entered and killed human cells that showed signs of hidden HIV infection.

112.   Years ago, surgeons killed cells in the thalamus to control tremors, just as they do in pallidotomies today.

113.   Professor Sten Orrenius at the Karolinska Institute said he and colleagues at the Swedish University of Lund discovered a component in breast milk that can kill cancer cells.

114.   A second defence system consisting of blood cells, programmed, to kill other cells infected by the virus, may be needed.

115.   And when researchers put copies of the full-length mutant protein into skin cells in a lab, the copies clumped up and killed the cells.

116.   Another part of the immune system, the cytotoxic T-cell, will kill cells marked by the signal molecule, thereby blocking the spread of the virus.

117.   Beaming enough light to partially activate the photo-drug but not kill cells, doctors found psoriasis lesions improved enough that the company is pursuing a larger study.

118.   Baldo said one of the peptides was cytotoxic, meaning it killed human cells and could potentially be used to remove cancerous tumors in conjunction with chemotherapy.

119.   Chemotherapy, in which patients take strong drugs that kill cancerous cells, can cause nausea, hair loss and lethargy.

120.   Creutzfeldt-Jakob disease, or CJD, attacks the brain, killing cells and creating gaps in tissue.