The DNA Preservation Tube utilizes a unique protective agent that is non-toxic, fixing blood cells and preventing the release of genome DNA while safeguarding dissociative DNA from degradation. It's ideal for various applications such as noninvasive fetal birth defect screening, tumor detection and research, monitoring tumor treatment progress, molecular diagnostics, acute disease inspection, and clinical drug development. Dissociative DNA can be stored for at least 14 days, simplifying sample handling and storage.