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dSpacer also known as an abasic site, tetrahydrofuran (THF) can be used to inert to a single base space into a DNA oligonucleotide. This absic base modification often used to exame DNA damage and repair that occur naturally through depurination or other mechanisms.
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-20°C To -70°C Oligonucleotides are stable in solution at 4°C for up to 2 weeks. Properly reconstituted material stored at -20°C should be stable for at least 6 months. Dried DNA (when kept at -20°C) in a nuclease-free environment should be stable for years.
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