epitope mapping near the N-terminus of Topo IIIα of human origin
recommended for detection of DNA Topoisomerase IIIα long and short forms of mouse, rat and human origin by WB, IF and ELISA; also reactive with additional species, including equine, canine, bovine and avian
Topo IIIα Background Information DNA topoisomerases are nuclear enzymes that regulate the topological structure of DNA by transiently breaking and rejoining DNA strands. Although DNA topoisomerase I (Topo I) and Topo II relax both positive and negative supercoils, Topo III relaxes only negative supercoils. Topo IIIå exists as a long and a short isoform, which are produced by alternative splicing. Topo IIIå, which localizes to the nucleolus, is constitutively expressed and remains at high levels throughout the cell cycle in HL-60 cells. Topo III∫ exists as three isoforms, ∫-1, ∫-2 and ∫-3, also produced by alternative splicing. Topo III∫-1 is expressed in testis, heart, and skeletal muscle, whereas Topo III∫-2 is expressed in thymus, kidney and pancreas.
