This Topoisomerase II alpha antibody is un-conjugated
Application
Western Blotting (WB)
Specificity
This antibody reacts with Topo IIa and ß. The antibody detects 170 KD of human Topo IIa and 180 KD of human Topo IIß on Western blot with whole cell lysate.
Cross-Reactivity (Details)
Species reactivity (tested):Human (Jurkat, Raji), Mouse (NIH3T3, P19, WR19L), Rat (PC12)
Purification
Protein-A Sepharose
Immunogen
Recombinant N-terminal Topoisomerase II fusion protein
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Background
Eukaryotic DNA Topoisomerase II is a ubiquitous ATP-dependent type II Topoisomerase that play an important role in DNA replication, transcription and recombination by changing the degree of superhelicity, catenation and knotting of topologically closed DNA molecules. Two isoforms of DNA Topoisomerases II have been reported in mammalian cells, Topoisomerase IIa and IIß. cDNA sequence of those isoforms reveals that both type II Topoisomerases are structurally and catalytically close. However, Topoisomerase IIß is expressed with no cell cycle dependence, whereas the expression of Topoisomerase IIa is cell cycle-regulated, peaking in G2-M phase and declining to a minimal level at the end of M phase. Topoisomerase IIa is poly-ubiquitinated and degraded preferentially in the apoptosis-induced human epithermoid carcinoma-derived cell line, MA1, in an ATP-and-ubiquitin-dependent manner. Recent studies also indicated that this isoform is selectively cleaved during Fas-mediated T cell apoptosis and Fas-, Staurosporine- and Anisomycin-mediated Jurkat cell apoptosis.Synonyms: DNA topoisomerase 2-alpha, DNA topoisomerase 2-beta, DNA topoisomerase II alpha isozyme, DNA topoisomerase II beta isozyme, TOP2, Top-2