All lanes : Anti-Smad3 antibody [EP568Y] (ab40854) at 1/1000 dilution

Lane 1 : Wild-type A549 cell lysate
Lane 2 : SMAD3 knockout A549 cell lysate
Lane 3 : HeLa cell lysate
Lane 4 : Human Kidney cell lysate

Lysates/proteins at 20 µg per lane.

Performed under reducing conditions.

Predicted band size: 48 kDa
Observed band size: 50 kDa why is the actual band size different from the predicted?

Lanes 1 - 4: Merged signal (red and green). Green - ab40854 observed at 48 kDa. Red - loading control, ab8245 (Mouse anti-GAPDH antibody [6C5]) observed at 37kDa.

ab40854 was shown to react with Smad3 in western blot. Membranes were blocked in 3% milk in TBS-T (0.1% Tween^®) before incubation with ab40854 and ab8245 (Mouse anti-GAPDH antibody [6C5]) overnight at 4°C at a 1 in 1000 Dilution and a 1 in 20000 dilution respectively. Blots were incubated with Goat anti-Rabbit IgG H&L (IRDye^® 800CW) preabsorbed (ab216773) and Goat anti-Mouse IgG H&L (IRDye^® 680RD) preabsorbed (ab216776) secondary antibodies at 1 in 20000 dilution for 1 hour at room temperature before imaging.

Immunohistochemical analysis of paraffin-embedded human colonic adenocarcinoma tissue labelling Smad3 with unpurified ab40854.

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

Immunocytochemsitry/Immunofluorescence analysis of HepG2 cells labelling Smad3 (green) with purified ab40854 at 1/2000 . Cells were fixed with 4% paraformaldehyde. An Alexa Fluor^® 488-conjugated goat anti-rabbit IgG (1/200) was used as the secondary antibody (green, left panel). Counterstained with DAPI (blue, right panel).

Overlay histogram showing HCT116 cells stained with unpurified ab40854 (red line). The cells were fixed with 80% methanol (5 min) and then permeabilized with 0.1% PBS-Tween for 20 min. The cells were then incubated in 1x PBS / 10% normal goat serum / 0.3M glycine to block non-specific protein-protein interactions followed by the antibody (ab40854, 1/100 dilution) for 30 min at 22ºC. The secondary antibody used was DyLight^® 488 goat anti-rabbit IgG (H+L) (ab96899) at 1/500 dilution for 30 min at 22ºC. Isotype control antibody (black line) was rabbit IgG (monoclonal) (1µg/1x10⁶ cells) used under the same conditions. Acquisition of >5,000 events was performed.

Standard Curve for Smad3 (Analyte: Smad3 protein (His tag) (ab89353, unpurified)); dilution range 1pg/ml to 1µg/ml using Capture Antibody Mouse monoclonal [AF9F7] to Smad3 (ab75512) at 5µg/ml and Detector Antibody Rabbit monoclonal [EP568Y] to Smad3 (ab40854) at 0.5µg/ml.

ab40854 staining Smad3 in human granulosa cells by ICC/IF (Immunocytochemistry/immunofluorescence). Cells were fixed with paraformaldehyde, permeabilized with ethanol and triton and blocked for 1 hour at 26°C. Samples were incubated with primary antibody (1/200) for 16 hours at 4°C. An undiluted IRDye^® 800CW-conjugated goat anti-rabbit IgG (H+L) polyclonal was used as the secondary antibody. Left - negative control (4 replicates).

See Abreview

All lanes : Anti-Smad3 antibody [EP568Y] (ab40854) at 1/5300 dilution (purified)

Lane 1 : HT-29 cell lysate
Lane 2 : HT-1080 cell lysate

Lysates/proteins at 10 µg per lane.

Secondary
All lanes : Peroxidase-conjugated goat anti-rabbit IgG (H+L) at 1/1000 dilution

Predicted band size: 48 kDa
Observed band size: 58 kDa why is the actual band size different from the predicted?

Blocking buffer and concentration: 5% NFDM/TBST.

Diluting buffer and concentration: 5% NFDM /TBST.

Anti-Smad3 antibody [EP568Y] (ab40854) at 1/5000 dilution (unpurified) + Jurkat cell lysate at 10 µg

Predicted band size: 48 kDa
Observed band size: 55 kDa why is the actual band size different from the predicted?

Anti-Smad3 antibody [EP568Y] (ab40854) at 1/5300 dilution (purified) + Rat liver tissue lysate at 10 µg

Secondary
Peroxidase-conjugated goat anti-rabbit IgG (H+L) at 1/1000 dilution

Predicted band size: 48 kDa
Observed band size: 58 kDa why is the actual band size different from the predicted?

Blocking buffer and concentration: 5% NFDM/TBST.

Diluting buffer and concentration: 5% NFDM /TBST.

Flow cytometry analysis of HT-29 cells labelling Smad3 with purified ab40854 at 1/210 (red). Cells were fixed with 2% paraformaldehyde. A FITC-conjugated goat anti-rabbit IgG (1/150) was used as the secondary antibody. Green - Isotype control, rabbit monoclonal IgG.

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of human liver tissue labelling Smad3 with purified ab40854 at 1/2000. Heat mediated antigen retrieval was performed using Tris/EDTA buffer pH 9. A prediluted HRP-polymer conjugated anti-rabbit IgG was used as the secondary antibody. Counterstained with Hematoxylin.

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of human prostate carcinoma tissue labelling unpurified ab40854 at 1/100 dilution.

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

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of human breast carcinoma tissue labelling unpurified ab40854.

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

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of human lung adenocarcinoma tissue labelling unpurified ab40854.

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

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of human glioma tissue labelling unpurified ab40854.

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

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of human gastric adenocarcinoma tissue labelling unpurified ab40854.

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