• NatureRecombinant
  • SourceInsect cells
  • Amino Acid Sequence
    • SpeciesHuman
    • Molecular weight85 kDa
    • Amino acids25 to 647
    • TagsStrepII tag C-Terminus


Our Abpromise guarantee covers the use of ab68104 in the following tested applications.

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

  • Applications


  • Purity> 90 % SDS-PAGE.
    ab68104 was purified by proprietary chromatographic techniques. Purity: Greater than 90.0% as determined by: (a) Analysis by RP-HPLC. (b) Analysis by SDS-PAGE.
  • FormLyophilised
  • Additional notesUpon reconstitution EGFR should be stored at 4°C between 2-7 days and for future use below -18°C. For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA).
  • Concentration information loading...

Preparation and Storage

  • Stability and Storage

    Shipped at 4°C. Upon delivery aliquot and store at -20°C or -80°C. Avoid repeated freeze / thaw cycles.

    Preservative: None
    Constituents: PBS, pH 7.4

  • ReconstitutionReconstitute the lyophilized EGFR in sterile PBS not less than 100µg/ml, which can then be further diluted to other aqueous solutions.

General Info

  • Alternative names
    • Avian erythroblastic leukemia viral (v erb b) oncogene homolog
    • Cell growth inhibiting protein 40
    • Cell proliferation inducing protein 61
    • EGF R
    • EGFR
    • Epidermal growth factor receptor
    • Epidermal growth factor receptor (avian erythroblastic leukemia viral (v erb b) oncogene homolog)
    • Epidermal growth factor receptor (erythroblastic leukemia viral (v erb b) oncogene homolog avian)
    • erb-b2 receptor tyrosine kinase 1
    • ERBB
    • ERBB1
    • Errp
    • HER1
    • mENA
    • NISBD2
    • Oncogen ERBB
    • PIG61
    • Proto-oncogene c-ErbB-1
    • Receptor tyrosine protein kinase ErbB 1
    • Receptor tyrosine-protein kinase ErbB-1
    • SA7
    • Species antigen 7
    • Urogastrone
    • v-erb-b Avian erythroblastic leukemia viral oncogen homolog
    • wa2
    • Wa5
    see all
  • FunctionReceptor tyrosine kinase binding ligands of the EGF family and activating several signaling cascades to convert extracellular cues into appropriate cellular responses. Known ligands include EGF, TGFA/TGF-alpha, amphiregulin, epigen/EPGN, BTC/betacellulin, epiregulin/EREG and HBEGF/heparin-binding EGF. Ligand binding triggers receptor homo- and/or heterodimerization and autophosphorylation on key cytoplasmic residues. The phosphorylated receptor recruits adapter proteins like GRB2 which in turn activates complex downstream signaling cascades. Activates at least 4 major downstream signaling cascades including the RAS-RAF-MEK-ERK, PI3 kinase-AKT, PLCgamma-PKC and STATs modules. May also activate the NF-kappa-B signaling cascade. Also directly phosphorylates other proteins like RGS16, activating its GTPase activity and probably coupling the EGF receptor signaling to the G protein-coupled receptor signaling. Also phosphorylates MUC1 and increases its interaction with SRC and CTNNB1/beta-catenin.
    Isoform 2 may act as an antagonist of EGF action.
  • Tissue specificityUbiquitously expressed. Isoform 2 is also expressed in ovarian cancers.
  • Involvement in diseaseLung cancer
    Inflammatory skin and bowel disease, neonatal, 2
  • Sequence similaritiesBelongs to the protein kinase superfamily. Tyr protein kinase family. EGF receptor subfamily.
    Contains 1 protein kinase domain.
  • Post-translational
    Phosphorylation at Ser-695 is partial and occurs only if Thr-693 is phosphorylated. Phosphorylation at Thr-678 and Thr-693 by PRKD1 inhibits EGF-induced MAPK8/JNK1 activation. Dephosphorylation by PTPRJ prevents endocytosis and stabilizes the receptor at the plasma membrane. Autophosphorylation at Tyr-1197 is stimulated by methylation at Arg-1199 and enhances interaction with PTPN6. Autophosphorylation at Tyr-1092 and/or Tyr-1110 recruits STAT3. Dephosphorylated by PTPN1 and PTPN2.
    Monoubiquitinated and polyubiquitinated upon EGF stimulation; which does not affect tyrosine kinase activity or signaling capacity but may play a role in lysosomal targeting. Polyubiquitin linkage is mainly through 'Lys-63', but linkage through 'Lys-48', 'Lys-11' and 'Lys-29' also occurs. Deubiquitination by OTUD7B prevents degradation. Ubiquitinated by RNF115 and RNF126.
    Methylated. Methylation at Arg-1199 by PRMT5 stimulates phosphorylation at Tyr-1197.
  • Cellular localizationSecreted and Cell membrane. Endoplasmic reticulum membrane. Golgi apparatus membrane. Nucleus membrane. Endosome. Endosome membrane. Nucleus. In response to EGF, translocated from the cell membrane to the nucleus via Golgi and ER. Endocytosed upon activation by ligand. Colocalized with GPER1 in the nucleus of estrogen agonist-induced cancer-associated fibroblasts (CAF).
  • Information by UniProt

References for Recombinant Human EGFR protein (ab68104)

This product has been referenced in:
  • Cosgrove S  et al. Pulmonary Proteases in the Cystic Fibrosis Lung Induce Interleukin 8 Expression from Bronchial Epithelial Cells via a Heme/Meprin/Epidermal Growth Factor Receptor/Toll-like Receptor Pathway. J Biol Chem 286:7692-704 (2011). Read more (PubMed: 21193404) »

See 1 Publication for this product

Product Wall

Thank you for contacting us regarding the purified EGFR protein ab68104. The EGFR protein provided contains the extracellular domain of the human EGFR (amino acids 25-647) excluding the signal peptide which is cleaved by the insect cells used for th...

Read More

I have received more information from my colleague which I would like to share with you. Unfortunately they have recommended not using ab89746 because ligand receptor association cannot be achieved extracellularly due to the hydrophilic nature of t...

Read More

Thank you for contacting us. We have not tested these products in Biocore (surface plasmon resonance) experiments. Theoretically these products should work however the conditions have to be optimized by end user. We can recommend coating ligand...

Read More

Thank you for your reply. I'm assuming the EGFR will be taken from human cancer cells? This does sound similar to a sandwich ELISA. For sandwich ELISA, we would usually recommend using a polyclonal to pull down as much of the protein a...

Read More