Related Experiment Video
Updated: Jun 20, 2026

Isolation and Derivation of Mouse Embryonic Germinal Cells
Published on: October 22, 2009
TOP2B: The First Thirty Years
Caroline A Austin1, Ka C Lee2, Rebecca L Swan3
1Institute for Cell and Molecular Biosciences, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne NE2 4HH, UK. caroline.austin@ncl.ac.uk.
Abstract:
Type II DNA topoisomerases (EC 5.99.1.3) are enzymes that catalyse topological changes in DNA in an ATP dependent manner. Strand passage reactions involve passing one double stranded DNA duplex (transported helix) through a transient enzyme-bridged break in another (gated helix). This activity is required for a range of cellular processes including transcription. Vertebrates have two isoforms: topoisomerase IIα and β. Topoisomerase IIβ was first reported in 1987. Here we review the research on DNA topoisomerase IIβ over the 30 years since its discovery.
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