Description_x000D_ General description_x000D_ Topoisomerase II α (TopoIIα) is a gene product with conserved catalytic activities and it promotes the progression of DNA damage. The α isoform is present in proliferating cells._x000D_ Topoisomerase II α is encoded by TOP2A gene, which is located on 17q21.2 in the human chromosome. It is essential for controlling the topological state of DNA by reversibly breaking the DNA strands during replication, recombination and transcription. TOP2A expression increases at late S phase and during G2/M of the cell cycle and decreases after mitosis. Polymorphism with TOP2A causes chromosome instability and tumorigenesis. TOP2A causes tumor proliferation and invasiveness in various cancer types like breast cancer, ovarian cancer and prostate cancer._x000D_ Application_x000D_ Human topoisomerase II α has been used in DNA cleavage assay._x000D_ Topoisomerase II α has been used in a study to assess aging processes in the human brain. Topoisomerase II α has also been used in a study to investigate its activity in HIV-1 replication._x000D_ Biochem/physiol Actions_x000D_ Used to study DNA structure and topology._x000D_ Unit Definition_x000D_ One unit will decatenate 0.2 μg of kinetoplast DNA in 30 minutes at 37°C._x000D_ Physical form_x000D_ Buffered aqueous glycerol solution, containing Trizma buffer (pH 7.7). Other components are present in the solution, and lot-specific information on these components may be obtained from Technical Service._x000D_ Preparation Note_x000D_ Recombinant enzyme overexpressed in a proprietary eukaryotic cell line._x000D_ Legal Information_x000D_ TOPO is a registered trademark of Life Technologies