Secondly, some complement system components form a membrane attack complex to assist antibodies to kill the bacterium directly.

The antibodies attach to the substances and kill the cancer cells, block their growth, or keep them from spreading.

"If antibodies can kill it," he said slowly, "can't you somehow --" "Reverse the process ?"

The antibodies can now kill Rh-positive red blood cells.

By coupling with its target, the antibody does not ordinarily kill it, but rather activates a barrage of defensive actions by other elements of the immune system.

Once this happens, anti-HIV antibodies can bind to and kill most of the host's T suppressor cell population.

These antibodies kill cells in the pancreas, called beta cells, that produce the hormone insulin, Dr. Pi-Sunyer said.

If you are exposed to the same disease in the future, the antibodies kill the bacteria or viruses before they have a chance to make you sick.

The antibodies would be designed to hook onto only cancerous cells and then kill them with attached poison or radioactive elements.