Recombinant Anti-STAT5b antibody [EPR16671] (ab178941)

ab178941 was shown to react with STAT5B in wild-type HeLa cells in Western blot with loss of signal observed in STAT5B knockout cell line ab266006 (STAT5B knockout cell lysate ab257710). Wild-type HeLa and STAT5B knockout cell lysates were subjected to SDS-PAGE. Membranes were blocked in 5% milk in TBST for 1 hr before incubation with ab178941 overnight at 4 °C at a 1/1000 dilution. Blots were incubated with goat anti-rabbit HRP secondary antibodies at 0.2μg/mL before imaging.

These data were provided by YCharOS Inc., an open science company with the mission of characterizing commercially available antibody reagents for all human proteins. Abcam and YCharOS are working together to help address the reproducibility crisis by enabling the life science community to better evaluate commercially available antibodies.

Lanes 1-2: Merged signal (red and green). Green - ab178941 observed at 90 kDa. Red - loading control ab8245 observed at 37 kDa.

 ab178941 Anti-STAT5b antibody [EPR16671] was shown to specifically react with STAT5b in wild-type HeLa cells. Loss of signal was observed when knockout cell line ab266006 (knockout cell lysate ab257710) was used. Wild-type and STAT5b knockout samples were subjected to SDS-PAGE. ab178941 and Anti-GAPDH antibody [6C5] - Loading Control (ab8245) were incubated overnight at 4°C at 1 in 20000 and 1 in 20000 dilution respectively. Blots were developed with Goat anti-Rabbit IgG H&L (IRDye^® 800CW) preadsorbed (ab216773) and Goat anti-Mouse IgG H&L (IRDye^® 680RD) preadsorbed (ab216776) secondary antibodies at 1 in 20000 dilution for 1 hour at room temperature before imaging.

Immunoprecipitation of K562 (Human chronic myelogenous leukemia cells from bone marrow) whole cell extract using ab178941 at 1/40 dilution. Western blot detection of STAT5b utilised ab178941 at 1/2000 dilution and Goat Anti-Rabbit IgG, (H+L), Peroxidase conjugated secondary antibody at 1/1000 dilution. The blocking and dilution buffer was 5% NFDM/TBST.

Chromatin was prepared from T-47D (starved overnight) treated with Prolactin(10nM 30min) and T-47D(starved overnight) non-treated cells according to the Abcam Dual-X-ChIP protocol*. Cells were fixed with 1.5 mM EGS for 30mins and then formaldehyde for 10min.
The ChIP was performed with 25 μg of chromatin, 5 μg of ab178941 (red), or 5 μg of rabbit normal IgG ab172730 (gray) and 20 μL of Protein A/G sepharose beads. The immunoprecipitated DNA was quantified by real time PCR (Sybr green approach).
Primers are from PMID: 15686596.
*http://www.abcam.com/resources?keywords=X%20ChIP%20protocol

Immunofluorescent analysis of 4% paraformaldehyde-fixed HeLa (Human epithelial cells from cervix adenocarcinoma) cells labeling STAT5b with ab178941 at 1/100 dilution. The cells were permeabilised with 0.1% Triton X-100. Goat anti-rabbit IgG (Alexa Fluor® 488) (ab150077) at 1/200 dilution was used as the secondary antibody (green). Nuclear and cytoplasm staining is detected. The nuclear counter stain is DAPI (blue). Tubulin is detected with ab7291 (Tubulin mouse mAb) at 1/500 and ab150120 (AlexaFluor®594 Goat anti-Mouse secondary) at 1/400 dilution (red). 

The negative controls are as follows;

1. ab178941 at 1/100 dilution followed by Goat anti mouse IgG (Alexa Fluor®594) at 1/400 dilution.
2. ab7291 (anti-Tubulin mouse mAb) at 1/500 dilution followed by Goat anti rabbit IgG (Alexa Fluor®488) ar 1/200 dilution.

Immunohistochemical analysis of paraffin-embedded Human spleen tissue labeling STAT5b with ab178941 at 1/500 dilution, followed by prediluted HRP Polymer for Rabbit/Mouse IgG. Nucleus staining on lymphocytes of Human spleen is detected. The negative control utilised PBS instead of primary antibody. Counter stained with Hematoxylin.

Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.

ab178941 staining STAT5bin the human cell line HeLa (human cervix adenocarcinoma) by intracellular flow cytometry. Cells were fixed with 4% paraformaldehyde and the sample was incubated with the primary antibody at a dilution of 1/40. A goat anti rabbit IgG (Alexa Fluor^® 488) at a dilution of 1/2000 was used as the secondary antibody. 

Isoytype control: Rabbit monoclonal IgG (Black) 

Unlabelled control: Cell without incubation with primary antibody and secondary antibody (Blue) 

Blocking/dilution buffer: 5% NFDM/TBST.

Blocking/dilution buffer: 5% NFDM/TBST.

Blocking/dilution buffer: 5% NFDM/TBST.

WB showing no cross reactivity with STAT5a.

Cross Immunoprecipitation of K562 (Human chronic myelogenous leukemia cells from bone marrow) whole cell extract showing no cross reactivity with STAT5a. Protein captured by anti-STAT5a antibody (ab32042) was detected by the same antibody in WB (image 1) but not by anti-STAT5b, ab178941 (image 2).

For WB detection, ab178941 was used at a 1/2000 dilution and Goat Anti-Rabbit IgG, (H+L), Peroxidase conjugated secondary antibody at a 1/1000 dilution. The blocking and dilution buffer was 5% NFDM/TBST.

Immunohistochemical analysis of paraffin-embedded Mouse spleen tissue labeling STAT5b with ab178941 at 1/500 dilution, followed by prediluted HRP Polymer for Rabbit/Mouse IgG. Nucleus staining on lymphocytes of Mouse spleen is detected. The negative control utilised PBS instead of primary antibody. Counter stained with Hematoxylin.

Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.

Immunohistochemical analysis of paraffin-embedded Rat colon tissue labeling STAT5b with ab178941 at 1/500 dilution, followed by prediluted HRP Polymer for Rabbit/Mouse IgG. Nucleus staining on lymphocytes and weak nucleus staining on gland epithelium of colon is detected. The negative control utilised PBS insead of primary antibody and the slide is counter stained with Hematoxylin.

Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.

Intracellular Flow Cytometry analysis of 2% paraformaldehyde K562 (Human chronic myelogenous leukemia cells from bone marrow) cellslabeling STAT5b with ab178941 at 1/60 dilution (red line). Secondary antibody used is a goat anti rabbit IgG (FITC) at 1/150 dilution. The isotype control is rabbit monoclonal IgG (black line).