Considering source cells for interactions is traditionally referred to as evaluating an opening criterion, but opening a cell (removing it from the checklist and adding its children to the end of the checklist) is only one possible outcome.
Scientists clone an animal by taking an egg cell, removing its genetic material, and replacing it with the nucleus of a cell from the animal they wish to clone--in Dolly's case, a mammary cell from a 6-year-old sheep.
Clinical therapy either excises or chemically kills the LSA cell, removing the antigen that stimulated the normal B cell.
Cancer results from genetic mutations that disrupt the normal biological processes within a cell, removing the fail-safes that prevent it from growing and reproducing uncontrollably.
Protein degradation plays many important physiological role in the cell, removing abnormal proteins, facilitating the recycling of amino acids, and regulating protein activity by eliminating molecules that are no longer needed.
