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CellBioGuy comments on An alarming fact about the anti-aging community - Less Wrong
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Do you have to do anything fancy for tooth storage? As I recall, the dentist managed to extract my wisdom teeth intact and so I think they're sitting in a box somewhere (but have been for ~five years). Given that people get useful DNA out of prehistoric specimens, that makes me not immediately dismiss the possibility (but I expect that freezing them or something similar is better).
You can get DNA from that easily but it's by no means living. You can't make a living cell from such DNA, you can just dissolve the tissue and get sequence data by running the resultant treated slurry into a sequencer. Hence the people who have been trying to clone mammoths for a decade failing - they can't find a single still-living culturable cell in any of those permafrost mammoth carcasses, despite trying and trying and trying, and thus can't do somatic cell nuclear transfer into an egg, even though they can get a complete set of mammoth sequence data.