Recombinant Human FGFR1 alpha (IIIc) His-tag Protein, CF

Catalog # Availability Size / Price Qty

SAVE +FREE SHIPPING with ACADEMIA23 (See Promo Details)

Recombinant Human FGFR1 alpha (IIIc) His-tag Protein Binding Activity.
2 Images
Product Details

Recombinant Human FGFR1 alpha (IIIc) His-tag Protein, CF Summary

Product Specifications

>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Measured by its binding ability in a functional ELISA. In a Human FGF acidic/FGF1 antibody (Catalog # AF232) coated plate, in the presence of 50.0 ng/mL of Recombinant Human FGF acidic/FGF1 (Catalog # 232-FA), Human FGFR1 alpha (IIIc) His-tag Protein binds with an ED50 of 1.00-5.00 µg/mL.
Human embryonic kidney cell, HEK293-derived human FGFR1 alpha protein
Arg22-Glu376, with a C-terminal 6-His tag
Accession #
N-terminal Sequence
Predicted Molecular Mass
40 kDa
70-85 kDa, under reducing conditions.

Product Datasheets

You must select a language.



Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.


Formulation Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.
Reconstitution Reconstitute at 500 μg/mL in PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.

Scientific Data

Binding Activity View Larger

In a Human FGF acidic/FGF1 antibody (AF232) coated plate, in the presence of 50.0 ng/mL of Recombinant Human FGF acidic/FGF1 (232-FA), Human FGFR1 alpha (IIIc) His-tag Protein (Catalog # 11118-FR) binds with an ED50 of 1.00‑5.00 µg/mL.

SDS-PAGE View Larger

2 μg/lane of Recombinant Human FGFR1 alpha (IIIc) His-tag Protein (Catalog # 11118-FR) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 70-85 kDa.

Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Background: FGFR1 alpha

Fibroblast growth factor receptor 1 (FGFR1) belongs to a family of type I transmembrane tyrosine kinases which mediate the biological functions of FGFs that are involved in a multitude of physiological and pathological cellular processes (1). The FGFR family is comprised of 4 structurally conserved members (FGFR1-4) all possessing an extracellular domain (ECD) with three immunoglobulin (Ig)-like domains, an acid-box region containing a run of acidic residues between the IgI and IgII domains, a transmembrane domain and cytoplasmic split tyrosine-kinase domain (1, 2). The ECD of mature, full-length FGFR1 shares 98% amino acid sequence identity with mouse FGFR1. Alternative splicing generates multiple forms of FGFR1-3, each with unique signaling characteristics (1-3). For FGFR1, alternative splicing of the ECD generates FGFR1A, FGFR1B, and FGFR1G isoforms of the receptor with the A isoform containing three Ig domains, while the B and G isoforms lack the N‑terminal IgI domain (3). Additional splicing of the IgIII domain, results in IIIa, IIIb, or IIIc isoforms (3). Only the alpha isoform has been identified for FGFR3 and FGFR4 and FGFR4 also lacks the IIIb and IIIc splicing events (4). The FGFR splice variants also exhibit distinct and varying binding affinities for different FGF ligands (2). FGFRs mediate the FGF signaling cascade which regulate developmental processes including cellular proliferation, differentiation, and migration, morphogenesis, and patterning (5). FGFRs transduce the signals through three dominant pathways including RAS/MAPK, PI3k/AKT, and PLC gamma (6). FGFR1 the most abundant FGFR and is widely expressed in many adult human tissues, but the splice variants display distinct tissue-specific differences with IIIc splice variants expressed in mesenchymal tissue (4, 7, 8). Mutations in FGFR1 or misregulation of FGFR1 mediated signaling is found in multiple diseases, with FGFR1A(IIIc) specifically upregulated, from breast and pancreatic cancer to Pfeiffer syndrome and osteoarthritis (4, 9-11). A soluble version of the FGFR1A(IIIc) splice variant has shown anti-angiogenic and anti-proliferative properties in multiple cancer cell line models (11).

  1. Ornitz, D.M. and Itoh, N. (2015) Wiley Interdiscip. Rev. Dev. Biol. 4:215.
  2. Zhang, X. et al. (2006) J Biol. Chem. 281:15694.
  3. Ferguson, H.R. et al. (2021) Signaling Cells 10:1201.
  4. Holzmann, K. et al. (2012) J Nucleic. Acids 2012:950508.
  5. Xie, Y. et al. (2020) Sig. Transduct. Target Ther. 5:181.
  6. Mossahebi-Mohammadi, M. et al. (2020) Front Cell Dev. Biol. 18:79.
  7. Hughes, S.E. (1997) J. Histochem. Cytochem. 45:1005.
  8. Delezoide, A.L. et al. (1998) Mech. Dev. 77:19.
  9. Yamashita-Sugahara, Y. et al. (2016) Sci. Rep. 6:35908.
  10. Teven, C.M. et al. (2014) Genes Dis. 1:199.
  11. Babina, I. and Turner, N. (2017) Nat. Rev Cancer 17:318.
Long Name
Fibroblast Growth Factor Receptor 1 alpha
Alternate Names
FGF R1a; FGFR1 alpha


No product specific FAQs exist for this product, however you may

View all Proteins and Enzyme FAQs

Reviews for Recombinant Human FGFR1 alpha (IIIc) His-tag Protein, CF

There are currently no reviews for this product. Be the first to review Recombinant Human FGFR1 alpha (IIIc) His-tag Protein, CF and earn rewards!

Have you used Recombinant Human FGFR1 alpha (IIIc) His-tag Protein, CF?

Submit a review and receive an Amazon gift card.

$25/€18/£15/$25CAN/¥75 Yuan/¥1250 Yen for a review with an image

$10/€7/£6/$10 CAD/¥70 Yuan/¥1110 Yen for a review without an image

Submit a Review