Recombinant Anti-CXCR4 antibody [EPUMBR3] (ab181020)

IHC image of CXCR4 staining on retina of E14 mouse embryo formalin fixed paraffin embedded tissue section. The section was pre-treated using heat mediated antigen retrieval with 10 mM sodium citrate buffer (pH6) for 20 mins in a microwave at 600W, and incubated overnight at + 4^oC with ab181020 at 5 ugml. Staining of primary antibody was detected using the appropriate biotinylated secondary antibodies followed by incubation with avidin-biotinylated peroxidase solution. DAB was used as the chromogen (15 min). The section was then counterstained with haematoxylin. As a negative control (inset), an identical assay was performed on retina of E14 knockout mouse (CXCR4 -/-) embryo.

For other IHC staining systems (automated and non-automated) customers should optimize variable parameters such as antigen retrieval conditions, primary antibody concentration and antibody incubation times.

Immunocytochemistry/Immunofluorescence analysis of Ramos (Human Burkitt's lymphoma cell line) labeling CXCR4 with purified ab181020 at 1/500 dilution. Cells were fixed with 4% PFA and permeabilized with 0.1% tritonX-100. ab150077 Goat anti rabbit IgG (Alexa Fluor^® 488) at 1/1000 was used as the secondary antibody. Nuclei were counterstained with DAPI. PBS was used instead of the primary antibody as the negative control.

ab181020 stained Jurkat cells. The cells were 100% methanol fixed for 5 minutes at -20°C and then incubated in 1%BSA / 10% normal goat serum / 0.3M glycine in 0.1% PBS-Tween for 1hour at room temperature to permeabilise the cells and block non-specific protein-protein interactions. The cells were then incubated with the antibody (ab181020 at 5µg/ml) overnight at +4°C. The secondary antibody (pseudo-colored green) was Goat Anti-Rabbit IgG H&L (Alexa Fluor® 488) preadsorbed (ab150081) used at a 1/1000 dilution for 1hour at room temperature. Alexa Fluor® 594 WGA was used to label plasma membranes (pseudo-colored red) at a 1/200 dilution for 1hour at room temperature. DAPI was used to stain the cell nuclei (pseudo-colored blue) at a concentration of 1.43µM for 1hour at room temperature.

Running buffer: MOPS.

Conditions: denatured/reduced.

This blot was produced using a 4-12% Bis-Tris gel under the MOPS buffer system. The gel was run at 200V for 60 minutes before being transferred onto a Nitrocellulose membrane at 30V for 70 minutes. The membrane was then blocked for an hour before being incubated with ab181020 (anti-CXCR4) and ab7671 (loading ctrl), overnight at 4°C. Before imaging, antibody binding was detected using labelled goat anti-rabbit (H+L; green) and labelled goat anti-mouse (H+L; red) at 1:10,000 dilutions for 1hr at room temperature.

IHC image of CXCR4 staining on Brain of E14 mouse embryo formalin fixed paraffin embedded tissue section. The section was pre-treated using heat mediated antigen retrieval with 10 mM sodium citrate buffer (pH6) for 20 mins in a microwave at 600W, and incubated overnight at + 4^oC with ab181020 at 1/500 dilution. Staining of primary antibody was detected using the appropriate biotinylated secondary antibodies followed by incubation with avidin-biotinylated peroxidase solution. DAB was used as the chromogen (15 min). The section was then counterstained with haematoxylin. As a negative control (inset), an identical assay was performed on Brain of E14 knockout mouse (CXCR4 -/-) embryo.

For other IHC staining systems (automated and non-automated) customers should optimize variable parameters such as antigen retrieval conditions, primary antibody concentration and antibody incubation times.

Immunohistochemical analysis of paraffin embedded Human small cell lung carcinoma tissue labeling CXCR4 using ab181020.