Recombinant Anti-CD40 antibody [EPR20735] (ab224639)

Immunohistochemical analysis of paraffin-embedded human tonsil tissue labeling CD40 with ab224639 at 1/250 dilution, followed by a ready to use Goat Anti-Rabbit IgG H&L (HRP). Membranous and cytoplasmic staining in human tonsil tissue (PMID:20593977; PMID:7507299) is observed. Counter stained with hematoxylin.

Secondary antibody only control: Used PBS instead of primary antibody, secondary antibody is a ready to use Goat Anti-Rabbit IgG H&L (HRP).

Perform heat mediated antigen retrieval using ab93684 (Tris/EDTA buffer, pH 9.0).

ab224639 staining CD40 in wild-type U2OS cells (top panel) and CD40 knockout U2OS cells (bottom panel). The cells were fixed with PFA (10min), permeabilized with 0.1% Triton X-100 for 5 minutes and then blocked with 1% BSA/10% normal goat serum/0.3M glycine in 0.1% PBS-Tween for 1h. The cells were then incubated with ab224639 at 1/100 dilution and ab7291 (Tubulin) at 1/1000 dilution overnight at +4°C, followed by a further incubation at room temperature for 1h with a goat secondary antibody to rabbit IgG (Alexa Fluor® 488) (ab150081) at 2 μg/ml (shown in green) and a goat secondary antibody to mouse IgG (Alexa Fluor® 594) (ab150120) at 2 μg/ml (shown in pseudo color red).  Nuclear DNA was labelled in blue with DAPI.

Image was taken with a confocal microscope (Leica-Microsystems, TCS SP8).

Flow cytometric analysis of Raji (human Burkitt's lymphoma cell line) cell line labeling CD40 with ab224639 at 1/600 dilution (red) compared with a Rabbit IgG, monoclonal [EPR25A] - Isotype Control (ab172730) (black) and an unlabeled control (cells without incubation with primary antibody and secondary antibody) (blue). Goat Anti-Rabbit IgG H&L (Alexa Fluor^® 488) (ab150077), at 1/2000 dilution was used as the secondary antibody.

Gated on total viable cells.

Immunofluorescent analysis of 4% paraformaldehyde-fixed, 0.1% Triton X-100 permeabilized Raji (human Burkitt's lymphoma cell line) cells labeling CD40 with ab224639 at 1/100 dilution, followed by Goat Anti-Rabbit IgG H&L (Alexa Fluor^® 488) (ab150077) secondary antibody at 1/1000 dilution (green). Confocal image showing membranous and weakly cytoplasmic staining in Raji cell line.

Negative control: Jurkat T cell line (PMID:10498643).

The nuclear counterstain is DAPI (blue). Tubulin is detected with Anti-alpha Tubulin antibody [DM1A] - Microtubule Marker (Alexa Fluor^® 594) (ab195889) at 1/200 dilution (red).

Secondary antibody only control: PBS instead of primary antibody, followed by Goat Anti-Rabbit IgG H&L (Alexa Fluor^® 488) (ab150077) secondary antibody at 1/1000 dilution.

Blocking/Dilution buffer: 5% NFDM/TBST.

CD40 was immunoprecipitated from 0.35 mg of Raji (human Burkitt's lymphoma cell line) whole cell lysate with ab224639 at 1/30 dilution. Western blot was performed from the immunoprecipitate using ab224639 at 1/1000 dilution. VeriBlot for IP Detection Reagent (HRP) (ab131366), was used for detection at 1/10,000 dilution.

Lane 1: Raji whole cell lysate 10 μg (Input).
Lane 2: ab224639 IP in Raji whole cell lysate (+).
Lane 3: Rabbit monoclonal IgG (ab172730) instead of ab224639 in Raji whole cell lysate (-).

Exposure time: 3 minutes.

Blocking and dilution buffer and concentration: 5% NFDM/TBST.

Immunohistochemical analysis of paraffin-embedded human diffuse large B-cell lymphoma tissue labeling CD40 with ab224639 at 1/250 dilution, followed by a ready to use Goat Anti-Rabbit IgG H&L (HRP). Membranous staining in human diffuse large B-cell lymphoma tissue (PMID: 20593977) is observed. Counter stained with hematoxylin.

Secondary antibody only control: Used PBS instead of primary antibody, secondary antibody is a ready to use Goat Anti-Rabbit IgG H&L (HRP).

Perform heat mediated antigen retrieval using ab93684 (Tris/EDTA buffer, pH 9.0).

Immunohistochemical analysis of paraffin-embedded human Hodgkin's lymphoma tissue labeling CD40 with ab224639 at 1/250 dilution, followed by a ready to use Goat Anti-Rabbit IgG H&L (HRP). Membranous and cytoplasmic staining in Reed-Sternberg cells and tumor cells of human Hodgkin's lymphoma (PMID:7507299) is observed. Counter stained with hematoxylin.

Secondary antibody only control: Used PBS instead of primary antibody, secondary antibody is a ready to use Goat Anti-Rabbit IgG H&L (HRP).

Perform heat mediated antigen retrieval using ab93684 (Tris/EDTA buffer, pH 9.0).

Tissue Microarrays stained for "Anti-CD40 antibody [EPR20735]” using "ab224639" in immunohistochemical analysis. This table provides a detailed overview of positive (tick mark) and negative (cross mark) staining per sample type tested. The sections were pre-treated using Heat mediated antigen retrieval using ab93684 (Tris/EDTA buffer, pH 9.0). The sections were incubated with ab224639 at +4°C overnight followed by a ready to use Goat Anti-Rabbit IgG H&L (HRP polymer).