Purified ab32143 staining STAT3 (phospho S727) in A431 cells by Immunocytochemistry/ Immunofluorescence. 4% PFA-fixed, 0.1% Triton X-100 permeabilized A431 (Human epidermoid carcinoma) cells labelled with ab32143 at 1/500 dilution, followed by Goat anti-rabbit IgG (Alexa Fluor 488) (ab150077) secondary antibody at 1/400 dilution (green). Confocal image showing nuclear staining on A431 cell line. The red staining is ab7291 anti-Tubulin (mouse mAb), followed by Goat Anti-Mouse IgG H&L (Alexa Fluor^® 594) (ab150120) secondary antibody.

Immunohistochemical staining of paraffin embedded human astrocytoma with purified ab32143 at a working dilution of 1/250. The secondary antibody used is HRP goat anti-rabbit IgG H&L (ab97051) at 1/500. The sample is counter-stained with hematoxylin. Antigen retrieval was perfomed using Tris-EDTA buffer, pH 9.0. PBS was used instead of the primary antibody as the negative control, and is shown in the inset.

All lanes : Anti-STAT3 (phospho S727) antibody [E121-31] (ab32143) at 1/5000 dilution (purified)

Lane 1 : C6 treated with epidermal growth factor
Lane 2 : untreated C6 whole cell lysates

Lysates/proteins at 20 µg per lane.

Secondary
All lanes : HRP goat anti-rabbit IgG (H+L) at 1/50000 dilution

Predicted band size: 88 kDa
Observed band size: 98 kDa why is the actual band size different from the predicted?

Blocking buffer: 5% NFDM/TBST
Dilution buffer: 5% NFDM/TBST

All lanes : purified

Lane 1 : A431 treated with epidermal growth factor
Lane 2 : untreated A431 cell lysate

Lysates/proteins at 20 µg per lane.

Secondary
All lanes : HRP goat anti-rabbit IgG (H+L) at 1/50000 dilution

Predicted band size: 88 kDa
Observed band size: 98 kDa why is the actual band size different from the predicted?

Blocking buffer: 5% NFDM/TBST
Dilution buffer: 5% NFDM/TBST

Immunohistochemical staining of paraffin embedded rat cerebral cortex with purified ab32143 at a working dilution of 1/250. The secondary antibody used is HRP goat anti-rabbit IgG H&L (ab97051) at 1/500. The sample is counter-stained with hematoxylin. Antigen retrieval was perfomed using Tris-EDTA buffer, pH 9.0. PBS was used instead of the primary antibody as the negative control, and is shown in the inset.

Immunohistochemical staining of paraffin embedded mouse liver with purified ab32143 at a working dilution of 1/250. The secondary antibody used is HRP goat anti-rabbit IgG H&L (ab97051) at 1/500. The sample is counter-stained with hematoxylin. Antigen retrieval was perfomed using Tris-EDTA buffer, pH 9.0. PBS was used instead of the primary antibody as the negative control, and is shown in the inset.

Immunocytochemical/Immunofluorescence analysis of untreated, EGF treated and EGF + LP treated A431 cells labelling STAT3 (phospho S727) with ab32143 (left) and STAT3 with ab32500 (right) both at a dilution of 1/500.

Cells were fixed with 4% paraformaldehyde and permeabilized with 0.1% Triton X-100. Goat Anti-Rabbit IgG H&L (Alexa Fluor^® 488) (ab150077) (1/1000) was used as the secondary antibody (green). DAPI (blue) was used as the nuclear counterstain. Anti-alpha Tubulin antibody [DM1A] - Microtubule Marker (Alexa Fluor® 594) (ab195889) (1/200) was used as a counterstain (red).

The green staining was increased and translocated from the cytoplasm into the nucleus in the EGF (ab9697 100ng/ml, 10min) treated A431 cells when compared with A431 cells without treatment. After LP treatment, the green signal was decreased. For the pan antibody, there was no great difference after EGF (100ng/ml, 10min) or EGF (100ng/ml, 10min) + LP treatment.

Dot Blot analysis of Lane 1: STAT3 (pS727) phospho peptide and Lane 2: STAT3 non-phospho peptide labeling STAT3 (phospho S727) with ab32143 at 1/1000 dilution (0.009 μg/ml). 5% NFDM /TBST was used as the diluting and blocking buffer and concentration. ab97051, Goat Anti-Rabbit IgG, (H+L), Peroxidase conjugated was used as the secondary antibody at 1/100,000 dilution. Exposure time: 10 seconds.

All lanes : Anti-STAT3 (phospho S727) antibody [E121-31] (ab32143) at 1/1000 dilution (unpurified)

Lane 1 : A431 cell lysate
Lane 2 : A431 + EGF cell lysate

Predicted band size: 88 kDa
Observed band size: 98 kDa why is the actual band size different from the predicted?

IHC-P analysis of brain astrocytoma using unpurified ab32143 at 1/50 dilution.

Perform heat mediated antigen retrieval before commencing with IHC staining protocol.