• Product nameAnti-IRS1 antibody
    See all IRS1 primary antibodies
  • Description
    Rabbit polyclonal to IRS1
  • Tested applicationsSuitable for: ICC/IF, WBmore details
  • Species reactivity
    Reacts with: Mouse
    Predicted to work with: Rat, Chicken, Human, Xenopus laevis, African Green Monkey
  • Immunogen

    Synthetic peptide corresponding to Human IRS1 aa 602-615.


  • Positive control
    • By Western blot this antibody detects an ~170 kDa protein representing IRS1 in 3T3 L1 cell extract. This antibody gave a positive result when used in the following formaldehyde fixed cell lines: MCF-7


Associated products


Our Abpromise guarantee covers the use of ab5603 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
ICC/IF Use a concentration of 5 µg/ml.
WB Use a concentration of 2 µg/ml. Detects a band of approximately 170 kDa (predicted molecular weight: 149 kDa).Can be blocked with Human IRS1 peptide (ab41776).


  • FunctionMay mediate the control of various cellular processes by insulin. When phosphorylated by the insulin receptor binds specifically to various cellular proteins containing SH2 domains such as phosphatidylinositol 3-kinase p85 subunit or GRB2. Activates phosphatidylinositol 3-kinase when bound to the regulatory p85 subunit.
  • Involvement in diseasePolymorphisms in IRS1 may be involved in the etiology of non-insulin-dependent diabetes mellitus (NIDDM) [MIM:125853].
  • Sequence similaritiesContains 1 IRS-type PTB domain.
    Contains 1 PH domain.
  • Post-translational
    Serine phosphorylation of IRS1 is a mechanism for insulin resistance. Ser-312 phosphorylation inhibits insulin action through disruption of IRS1 interaction with the insulin receptor.
    Phosphorylation of Tyr-896 is required for GRB2-binding.
  • Information by UniProt
  • Database links
  • Alternative names
    • HIRS 1 antibody
    • HIRS1 antibody
    • Insulin receptor substrate 1 antibody
    • IRS 1 antibody
    • IRS-1 antibody
    • IRS1 antibody
    • IRS1_HUMAN antibody
    • OTTHUMP00000164234 antibody
    see all

Anti-IRS1 antibody images

  • ICC/IF image of ab5603 stained MCF-7 cells. The cells were 4% formaldehyde fixed (10 min) and then incubated in 1%BSA / 10% normal goat serum / 0.3M glycine in 0.1% PBS-Tween for 1h to permeabilise the cells and block non-specific protein-protein interactions. The cells were then incubated with the antibody ab5603 at 5µg/ml overnight at +4°C. The secondary antibody (pseudo-colored green) was Alexa Fluor® 488 anti- rabbit (ab150081) IgG (H+L) preadsorbed, used at a 1/1000 dilution for 1h. Alexa Fluor® 594 WGA was used to label plasma membranes (pseudo-colored red) at a 1/200 dilution for 1h at room temperature. DAPI was used to stain the cell nuclei (pseudo-colored blue) at a concentration of 1.43µM for 1hour at room temperature.

References for Anti-IRS1 antibody (ab5603)

This product has been referenced in:
  • Vong KI  et al. Sox9 is critical for suppression of neurogenesis but not initiation of gliogenesis in the cerebellum. Mol Brain 8:25 (2015). Read more (PubMed: 25888505) »
  • Shuai L  et al. Durable pluripotency and haploidy in epiblast stem cells derived from haploid embryonic stem cells in vitro. J Mol Cell Biol 7:326-37 (2015). Read more (PubMed: 26169120) »

See all 2 Publications for this product

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