BIOLOGICAL MATERIAL – COLLECTION, CHARACTERIZATION AND STORAGE
has been recovered from material stored at room temperature for several years . When samples are not frozen, for example clothing, they are stored in acid-free paper rather than plastic bags, to minimize the build up of any moisture. Once the DNA has been extracted from a sample, the DNA can be stored short term at 4 ◦C but should be stored at −20 to −70 ◦C for long term storage.
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