If you have samples you use frequently, such as reference samples or positive samples, we recommend you make aliquots and store them at -20°C. One aliquot at a time can then be stored at 4°C.
DNA extracted for MLPA analysis should ideally be stored in TE0.1 (10 mM Tris-HCl pH 8.0 + 0.1 mM EDTA), as this increases stability as opposed to storage in water. TE0.1 is also more suitable for MLPA reactions; see this article for more information.
Long-term storage at 4°C may degrade sample quality. Evaporation can increase the concentration of impurities, such as EDTA, which can inhibit downstream reactions. The growth of microorganisms can also degrade sample quality and introduce metabolites that can inhibit reactions.
The information provided in this material is correct for the majority of our products. However, for certain applications, the instructions for use may differ. In the event of conflicting information, the relevant instructions for use take precedence.