Register or Login
  • All
  • Uniprot Id
  • Catalog #
  • Peptide Sequence
>   home   >   Products   >   Primary Antibodies   >   Signal Transduction   >   PI3-kinase (p85) Antibody (subunit alpha) (C-term)   

PI3-kinase (p85) Antibody (subunit alpha) (C-term)

Rabbit Monoclonal Antibody

  • WB - PI3-kinase (p85) Antibody (subunit alpha) (C-term) AJ1608a
    A. Western blot analysis of anti- PI3-K p85 subunit alpha RabMAb (Cat. #AJ1608a), dilution 1:2,000. A: A431 B: MCF-7 C: Raji
  • IHC - PI3-kinase (p85) Antibody (subunit alpha) (C-term) AJ1608a
    B. Immunohistochemical analysis of paraffin-embedded human breast carcinoma using anti-PI3-K p85 subunit alpha RabMAb (Cat. #AJ1608a).
  • IF - PI3-kinase (p85) Antibody (subunit alpha) (C-term) AJ1608a
    C. Immunofluorescent staining of HeLa cells using anti- PI3-K p85 subunit alpha RabMAb (Cat. #AJ1608a).
Product Information
  • Applications Legend:
  • WB=Western Blot
  • IHC=Immunohistochemistry
  • IHC-P=Immunohistochemistry (Paraffin-embedded Sections)
  • IHC-F=Immunohistochemistry (Frozen Sections)
  • IF=Immunofluorescence
  • FC=Flow Cytopmetry
  • IC=Immunochemistry
  • ICC=Immunocytochemistry
  • IP=Immunoprecipitation
  • DB=Dot Blot
  • CHIP=Chromatin Immunoprecipitation
  • FA=Fluorescence Assay
  • IEM=Immunoelectronmicroscopy
  • EIA=Enzyme Immunoassay
Primary Accession P27986
Reactivity Human, Rat
Host Rabbit
Clonality Monoclonal
Clone Names EP380Y
Calculated MW 83598 Da
Gene ID 5295
Other Names Phosphatidylinositol 3-kinase regulatory subunit alpha, PI3-kinase regulatory subunit alpha, PI3K regulatory subunit alpha, PtdIns-3-kinase regulatory subunit alpha, Phosphatidylinositol 3-kinase 85 kDa regulatory subunit alpha, PI3-kinase subunit p85-alpha, PtdIns-3-kinase regulatory subunit p85-alpha, PIK3R1, GRB1
Target/Specificity A synthetic peptide corresponding to residues in the C-term of human PI3-K 85 alpha was used as an immunogen.
Dilution WB~~1:2000
Format 50 mM Tris-Glycine (pH 7.4), 0.15 M NaCl, 40% Glycerol, 0.01% sodium azide and 0.05% BSA.
StorageMaintain refrigerated at 2-8°C for up to 6 months. For long term storage store at -20°C in small aliquots to prevent freeze-thaw cycles.
PrecautionsPI3-kinase (p85) Antibody (subunit alpha) (C-term) is for research use only and not for use in diagnostic or therapeutic procedures.
Protein Information
Name PIK3R1
Synonyms GRB1
Function Binds to activated (phosphorylated) protein-Tyr kinases, through its SH2 domain, and acts as an adapter, mediating the association of the p110 catalytic unit to the plasma membrane. Necessary for the insulin-stimulated increase in glucose uptake and glycogen synthesis in insulin-sensitive tissues. Plays an important role in signaling in response to FGFR1, FGFR2, FGFR3, FGFR4, KITLG/SCF, KIT, PDGFRA and PDGFRB. Likewise, plays a role in ITGB2 signaling (PubMed:17626883, PubMed:19805105, PubMed:7518429). Modulates the cellular response to ER stress by promoting nuclear translocation of XBP1 isoform 2 in a ER stress- and/or insulin-dependent manner during metabolic overloading in the liver and hence plays a role in glucose tolerance improvement (PubMed:20348923).
Tissue Location Isoform 2 is expressed in skeletal muscle and brain, and at lower levels in kidney and cardiac muscle. Isoform 2 and isoform 4 are present in skeletal muscle (at protein level)
Research Areas
Citations (0)

Thousands of laboratories across the world have published research that depended on the performance of antibodies from Abgent to advance their research. Check out links to articles that cite our products in major peer-reviewed journals, organized by research category.

Submit your citation using an Abgent antibody to, and receive a free "I Love Antibodies" mug.


PI3-Kinases (PI3-Ks) are a family of lipid kinases that are implicated in signal transduction. PI3-K consists of two subunits; the regulatory subunit p85 and the catalytic subunit p110 (1-2). In quiescent cells p85 maintains p110 in a low activity state. Upon growth factor stimulation, p85 directly interacts with phosphotyrosine residues of activated growth factor receptors or adaptor proteins leading to activation of p110. p85 exists in two isoforms: p85 , including two short forms termed p50 and p55/AS53 and p85 including short form p55 PIK/p55 (3). The p85 adaptor protein uses the inter-SH2 (iSH2) region to bind p110 and employs SH3 and SH2 domains, phosphotyrosine residues, and proline-rich motifs to interact with activated tyrosine kinases such as BCR/ABL and NPM/ALK or adaptor proteins including Shc, c-Cbl, Crk-L, and Gab2 (4-5).


1. Otsu et al. (1992) Cell 65, 91-104
2. Hiles et al. (1991) Cell 70, 419-429
3. Inukai et al. (1997) J. Biol. Chem. 272, 7873-7882
4. Klippel, A., J. A. Escobedo, Q. Hu, and L. T. Williams. Mol. Cell. Biol. 13:5560-5566.
5. Jain, S. K., W. Y. Langdon, and L. Varticovski. 1997.Oncogene 14:2217-2228

Abgent welcomes feedback from its customers.

If you have used an Abgent product and would like to share how it has performed, please click on the "Submit Review" button and provide the requested information. Our staff will examine and post your review and contact you if needed.

If you have any additional inquiries please email technical services at

Cat# AJ1608a
(40 western blots)
Alternative Products:

Ordering Information

United States
AlbaniaAustraliaAustriaBelgiumBosnia & HerzegovinaBrazilBulgariaCanadaChinaCroatiaCyprusCzech RepublicDenmarkEstoniaFinlandFranceGermanyGreeceHong KongHungaryIcelandIndiaIndonesiaIrelandIsraelItalyJapanKoreaLatviaLithuaniaLuxembourgMacedoniaMalaysiaMaltaNetherlandsNew ZealandNorwayPakistanPolandPortugalRomaniaSerbiaSingaporeSlovakiaSloveniaSouth AfricaSpainSwedenSwitzerlandTaiwanTurkeyUnited KingdomUnited StatesVietnamOthers
Abgent, Inc.
(888) 735-7227 / (858) 622-0099
(858) 622-0609

Shipping Information

Domestic orders (in stock items)
Shipped out the same day. Orders placed after 1 PM (PST) will ship out the next business day.
International orders
Contact your local distributors
Santa Cruz Alternative
Terms & Conditions