Western blotting analysis using DNA topoisomerase II alpha antibody (Cat#4021). Total cell lysates (30 μg) from various cell lines were loaded and separated by SDS-PAGE. The blot was incubated with DNA topoisomerase II alpha antibody (Cat#4021, 1:5,000) and HRP-conjugated goat anti-rabbit secondary antibody (Cat#201, 1:20,000) respectively. Image was developed using NaQ™ ECL Substrate Kit (Cat#716).
Immunohistochemistry was performed on paraffin-embedded human sigmoid colon carcinoma using DNA topoisomerase II alpha antibody (Cat#4021, 1:200). Antigen retrieval was done in sodium citrate buffer (pH 6.0). DAB was used for detection, with hematoxylin counterstaining. Images were acquired using a Nikon Ci-L Plus microscope (40× objective). Scale bar: 25 μm.
Immunocytochemical staining of HepG2 cells with DNA topoisomerase II alpha antibody (Cat#4021, 1:1,000). Nuclei were stained blue with DAPI; DNA topoisomerase II alpha was stained magenta with Alexa Fluor® 647. Images were taken using Leica stellaris 5. Protein abundance based on laser Intensity and smart gain: Medium. Fixative solution: 4% Paraformaldehyde in 1x PBS; Permeabilization solution: 0.5% Triton X-100 in 1x PBS. Scale bar: 20 μm.
Flow cytometric analysis of DNA topoisomerase II alpha expression in HepG2 cells using DNA topoisomerase II alpha antibody (Cat#4021, 1:2,000). Fixative solution: 4% Paraformaldehyde in 1x PBS; Permeabilization solution: 0.5% Triton X-100 in 1x PBS. Green, isotype control; red, DNA topoisomerase II alpha.
