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What is the shelf life of my oligo?
The shelf life of an oligo is dependent on the temperature at which the oligo is stored, and how the oligo is resuspended. Temperature is the more important of the 2 variables. Generally, oligos should be stored at –20°C. At this temperature an oligo has a minimum shelf life of 2 years, whether it is stored dry / lyophilized, in TE buffer, or in (non-DEPC treated) water.
Please see the Technical Report, Oligonucleotide Stability Study,for data on oligonucleotide storage and a more thorough explanation.