Optimized buffers lyse samples, stabilize nucleic acids, and enhance selective DNA adsorption to the QIAamp membrane. Alcohol is added and lysates loaded onto the QIAamp MinElute spin column. Wash buffers are used to remove impurities and pure, ready-to-use DNA is then eluted in water or low-salt buffer.
DNA was purified from rodent kidney laser microdissection (LMD) samples using the QIAamp DNA Micro Kit or using a direct lysis PCR protocol, as indicated. GAPDH PCR was performed on 1 and 10 µl of each eluate. M: Marker; +: positive control; –: negative control.
DNA was purified from blood samples (1–64 µl) using the QIAamp DNA Micro Kit following the blood protocol. DNA was eluted in 20 µl Buffer AE and 2 µl of each eluate was amplified by real-time PCR. Efficient amplification was shown in all cases.