There are at least two type II topoisomerases in animal cells: Topo IIa and Topo IIb (Chung et al., 1989; Tan et al., 1992). The former is a cell cycle regulated enzyme of 170 kDa and the latter is not related to cell cycle phase and is slightly larger (180 kDa). This rabbit polyclonal antibody is directed specifically against the C-terminus of purified topo IIb.
This polyclonal antibody works with the following:
- 1. Immunohistochemistry Typical working dilution of 1:20 to 1:40 using a high temperature unmasking technique (see our technical literature). Typically, 60 min of primary AB incubation should be performed at room temperature. All other procedures for detection (secondary antibody, substrates, fluorescent detection) are standard but should be worked out empirically for your specific system.
- 2. Western blotting: The antibody concentration is provided in “western blotting units” where 1 unit corresponds to a 1:1000 dilution of antibody to make a working solution of probe. This antibody is supplied at 2.5 unit/ul; thus, 1 ul of the AB should be diluted to 2.5 ml to make a final working solution for probing of a Western blot.
Antibody Vial contents:
The vial contains 250 units of crude serum containing antibody to topo IIb. The antibody is stable for 1-2 months at 4°C. For long term storage, the AB should be aliquoted and stored at -20°C. Repeated freezing/thawing must be avoided. Prepare working stocks of the reagent on the day of use. The AB is in the form of rabbit serum.
Material Safety Data:
THIS PRODUCE IS NOT LICENSED OR APPROVED FOR ADMINISTRATION TO HUMANS OR TO ANIMALS OTHER THAN EXPERIMENTAL ANIMALS.
The product is sold as an antibody for research purposes only. Safe lab practices should be employed when handling this product. Chemical, physical and toxicological analyses of the product have not been performed.
Shipped at ambient temperature and stable for 1-2 months at 4°C. For longer term storage, aliquot and store at -20°C. Avoide repeat freezing/thawing. Prepare working stocks of the reagent on the day of use.
Austin, C.A., and Marsh, K. Eukaryotic Topoisomerase II13. Bioessays 20:215-226 (1998). *Baumann et al., Differential immunohistochemical staining of DNA topo II a and f3 in human tissues and for topo II 13 in non-Hodgkin’s lymphomas. Mod. Pathol. 10:168-175 (1997).
Turley et al., Distribution and expression of different isoforms of DNA topo II in normal and neoplastic human tissues. British Journal of Cancer 75: 1340-1346 (1997)
Negri et al., DNA topo II 13: stability and distribution in different animal cells in comparison to topo I and topo IIa. Experimental Cancer Res. 206:128-133 (1992)