EDTA-treated blood samples were frozen and thawed up to 3 times. DNA was purified at the end of each freeze-thaw cycle. DNA was purified from 200 µl samples using the QIAamp DSP DNA Blood Mini Kit and eluted in 200 µl elution buffer. DNA yields are normalized to the yield from fresh sample (100%). Each bar represents the results from 32 replicates (mean ± standard deviation).
Genomic DNA is purified with a spin procedure (with centrifuge) or a vacuum procedure (with vacuum manifold and centrifuge).
Universal DNA purification system easily fits into diagnostic workflows.