The BcMag™ One-step DNA Purification System uses negative chromatography magnetic beads to quickly extract and purify DNA from a wide range of biological samples, including blood, animal cells, plants, body fluids, stains, swabs of body fluids, stripped cells, cigarette butts, hair, fingernail scrapings, epithelial cells, bite marks, semen, and touch DNA samples. The magnetic beads in this system have a proprietary surface chemistry that allows them to simultaneously lyse cells and capture PCR inhibitors when mixed with the sample. The magnetic beads-PCR inhibitor complex can then be easily removed using a magnet, leaving behind pure DNA that is ready for downstream analysis.