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Immunofluorescence analysis of PTB (Clone 7) was performed using 90% confluent log phase MCF-7 cells. The cells were fixed with 4% paraformaldehyde for 10 minutes, permeabilized with 0.1% Triton™ X-100 for 10 minutes, and blocked with 1% BSA for 1 hour at room temperature. The cells were labeled with PTBP1 (7) Mouse Monoclonal Antibody (32-5000) at 2µg/ml in 0.1% BSA and incubated for 3 hours at room temperature and then labeled with Goat anti-Mouse IgG (H+L) Superclonal™ Secondary Antibody, Alexa Fluor® 488 conjugate (A28175) at a dilution of 1:2000 for 45 minutes at room temperature (Panel a: green). Nuclei (Panel b: blue) were stained with SlowFade® Gold Antifade Mountant with DAPI (S36938). F-actin (Panel c: red) was stained with Alexa Fluor® 555 Rhodamine Phalloidin (Product # R415, 1:300). Panel d represents the merged image showing nuclear localization. Panel e shows the no primary antibody control. The images were captured at 60X magnification.
|Tested species reactivity||Human|
|Published species reactivity||Human|
|Host / Isotype||Mouse / IgG1|
|Immunogen||Recombinant human PTB protein.|
|Storage buffer||PBS, pH 7.4|
|Contains||0.1% sodium azide|
|Tested Applications||Dilution *|
|Flow Cytometry (Flow)||3-5 µg/10^6 cells|
|Immunocytochemistry (ICC)||2 µg/ml|
|Immunofluorescence (IF)||2 µg/ml|
|Immunoprecipitation (IP)||Assay Dependent|
|Western Blot (WB)||2-4 µg/ml|
* Suggested working dilutions are given as a guide only. It is recommended that the user titrate the product for use in their own experiment using appropriate negative and positive controls.
|Western Blot (WB)||See 3 publications below|
This gene belongs to the subfamily of ubiquitously expressed heterogeneous nuclear ribonucleoproteins (hnRNPs). The hnRNPs are RNA-binding proteins and they complex with heterogeneous nuclear RNA (hnRNA). These proteins are associated with pre-mRNAs in the nucleus and appear to influence pre-mRNA processing and other aspects of mRNA metabolism and transport. While all of the hnRNPs are present in the nucleus, some seem to shuttle between the nucleus and the cytoplasm. The hnRNP proteins have distinct nucleic acid binding properties. The protein encoded by this gene has four repeats of quasi-RNA recognition motif (RRM) domains that bind RNAs. This protein binds to the intronic polypyrimidine tracts that requires pre-mRNA splicing and acts via the protein degradation ubiquitin-proteasome pathway. It may also promote the binding of U2 snRNP to pre-mRNAs. This protein is localized in the nucleoplasm and it is also detected in the perinucleolar structure. Alternatively spliced transcript variants encoding different isoforms have been described.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
Interleukin 7 up-regulates CD95 protein on CD4+ T cells by affecting mRNA alternative splicing: priming for a synergistic effect on HIV-1 reservoir maintenance.
32-5000 was used in western blot to study the effect of interleukin 7 on CD95 protein in CD4+ T cells and its mechanism.
|Yin Y,Zhang S,Luo H,Zhang X,Geng G,Li J,Guo X,Cai W,Li L,Liu C,Zhang H||The Journal of biological chemistry (290:35)||2015|
Identification of cis-acting elements and splicing factors involved in the regulation of BIM Pre-mRNA splicing.
32-5000 was used in western blot to identify the regulatory factors involved in the BIM pre-mRNA splicing
|Juan WC,Roca X,Ong ST||PloS one (9:null)||2014|
|Human||Not Cited||The polypyrimidine tract-binding protein (PTB) is involved in the post-transcriptional regulation of human inducible nitric oxide synthase expression.||Pautz A,Linker K,Hubrich T,Korhonen R,Altenhöfer S,Kleinert H||The Journal of biological chemistry (281:32294)||2006|
57 kDa RNA-binding protein PPTB-1; heterogeneous nuclear ribonucleoprotein I; heterogeneous nuclear ribonucleoprotein polypeptide I; hnRNP I; HNRNP-I; HNRNPI; HNRPI; polypyrimidine t; polypyrimidine tract binding protein (heterogeneous nuclear ribonucleoprotein I); pPTB; PTB-1; PTB-T; PTB2; PTB3; PTB4; RNA-binding protein
HNRNP-I; HNRNPI; HNRPI; pPTB; PTB; PTB-1; PTB-T; PTB2; PTB3; PTB4; PTBP1