Depends on how long you want to keep it ans whether you need regular access. For longer term storage you need extremely cold storage (like -160 C) and storage in Tris-EDTA or ethanol- or store it dried
I thought DNA lasted for ever - haven't scientists discovered stuff about prehistoric animals using DNA ?. Not that I'm suggesting your grandfather's a dinosaur ;-)
Not forever. The older stuff happened to be in conditions it stayed ok. Under the most ideal conditions, DNA can theoretically survive for a million years.
@maydup i wanted to preserve my grandfathers DNA in a hope that someday in the future he could be brought back to life, you have already seen how science progressed in the last 90 years, so
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