Human TOP2B Antibody Summary
aa 1187-1621
Accession # Q02880
Applications
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Scientific Data
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Detection of Human TOP2B by Western Blot. Western blot shows lysates of K562 human chronic myelogenous leukemia cell line. Gels were loaded with 30 µg of whole cell lysate (WCL), 20 µg of cytoplasmic (Cyto), and 10 µg of nuclear extracts (Nuc). PVDF Membrane was probed with 0.2 µg/mL of Sheep Anti-Human TOP2B Antigen Affinity-purified Polyclonal Antibody (Catalog # AF6348) followed by HRP-conjugated Anti-Sheep IgG Secondary Antibody (Catalog # HAF016). A specific band was detected for TOP2B at approximately 185 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group1.
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Western Blot Shows Human TOP2B Specificity by Using Knockout Cell Line. Western blot shows lysates of HEK293 human embryonic kidney parental cell line and TOP2B knockout HEK293 cell line (KO). PVDF membrane was probed with 0.2 µg/mL of Sheep Anti-Human TOP2B Antigen Affinity-purified Polyclonal Antibody (Catalog # AF6348) followed by HRP-conjugated Anti-Sheep IgG Secondary Antibody (Catalog # HAF016). A specific band was detected for TOP2B at approximately 245 kDa (as indicated) in the parental HEK293 cell line, but is not detectable in knockout HEK293 cell line. GAPDH (Catalog # AF5718) is shown as a loading control. This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
Reconstitution Calculator
Preparation and Storage
- 12 months from date of receipt, -20 to -70 °C as supplied.
- 1 month, 2 to 8 °C under sterile conditions after reconstitution.
- 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: TOP2B
TOP2B (DNA Topoisomerase II beta ) is a 180‑185 kDa member of the type IIA subfamily, topoisomerase family of molecules. It is ubiquitously expressed, and represents the larger of two known topoisomerases (the 2A/ alpha -form being 170 kDa in size). TOP2A is essential for cell division, while TOP2B is active postmitotically. In an ATP-dependent manner, homodimeric TOP2B relieves torsional stress created in DNA during transcription, or as a consequence of replication. TOP2B first induces cleavage of double-stranded DNA, creating a space that allows for the physical repositioning of chromatin and a reduction in tension. This is followed by closure and ligation of the cleaved ends to recreate the original DNA structure. Human TOP2B is 1626 amino acids (aa) in length. It contains an ATPase domain (aa 101‑201), an NES (aa 1034‑1044), more that 30 Ser/Thr phosphorylation sites and a C-terminal DTHCT region (aa 1508‑1611). There is one splice variant that shows a deletion of aa 24‑28. Over aa 1187‑1621, human TOP2B shares 91% aa identity with mouse TOP2B.
Product Datasheets
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