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Many types of human-cells don't abide by the classic Hayflick limit, including HeLa cells, cancer cells, and gametes.

This brings up the point: if the cells can indeed divide indefinitely, which even stem cells cannot, then aren't these effectively cancer cells / made cancerified? Perhaps this was done on purpose independently to make the cell culture easier to work with, but that should have been mentioned.



They might share some properties with cancer cells, but probably not all the key characteristics.

For example, one key feature of a cancer cell is that it ignores signals that would causes normal cells to stop growing or apoptose (die).




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