Edited by Chang Zhu
Many reagents used in biomedical labs need to be stored frozen. For
storage at -20 °C, common household refrigerators can be used. However,
make sure the freezer is not self-defrosting. A self-defrosting freezer
temporarily raises temperature to minimize ice accumulation, which may cause
repeated freeze and thaw of temperature-sensitive reagents and destroy
Storage boxes that are designed to minimize temperature fluctuations can
be used for storing enzymes and other reagents.