All restriction enzymes should be stored at -20°C. For Hin1II, storage at -70°C is recommended.
During shipment on dry ice, enzymes may freeze. This does not affect their quality – all Fermentas enzymes are 100% active after at least three freeze-thaw cycles.
For 24-48 hour delivery, enzymes may be shipped on blue ice since their quality is not affected by short exposure to 4°C.