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GenTegra-DNA: GenTegra-DNA is a water soluble chemical matrix that when added to purified DNA allows it to be air-dried to form a solid matrix which preserves DNA in the dry state. The protection is near perfect at the extremes of temperature (-80°C to +56°C) for >4yrs. GenTegra-DNA is especially valuable and effective at protecting against the high temperatures likely to be encountered when shipping samples. Studies prove conclusively that GenTegra-DNA protects DNA better than storage at -20°C or -80°C and you save valuable freezer space. GenTegra-DNA has been protecting DNA samples since 2009 and is protected by an awarded US Patent. All GenTegra-DNA products have a expected shelf life of greater than 3-years at ambient temperatures.