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Human IGF-1R Recombinant (CD221)


accession:  P68069
   Size A     20ug   $ 160
   Size B      100ug  $480
   Size C      500ug  $ 1650
Domain  :  Ig-like C2
Gene  :  IGF1 Receptor
Catalog no. :  RKP68069

Optimized DNA sequence  encoding extracellular domain of human IGF-1R (CD221) including a C-terminal 6His tag was expressed in HEK293 cells.

Molecular weight:

Recombinant human IGF-1R (CD221) is a heterodimer protein, due to glycosylation migrates as an approximately 50kDa,120kDa,150kDa protein under reducing ocnditions on SDS-PAGE.

>95%, as determined by SDS-PAGE and HPLC

Biological Activity:
The activity of recombinant IGF-1R was measured by its ability to bind Human IGF-1 in a functional ELISA assay.

Endotoxin content was assayed using a LAL gel clot method.
Endotoxin level was found to be less than 0.1 ng/µg(1EU/µg).

Recombinant IGF-1 receptor is supplied as a 0.2 μm filtered PBS solution, pH7.2.


The lyophilized protein is stable for at least 2 years from date of receipt at -20° C.

Upon reconstitution, the protein can be stored in working aliquots at 2° - 8° C for one month, or at -20°C to -70°C for twelve months, addition of a carrier protein to your working aliquots (0.1% BSA or HSA) is recommended for long term storage 

Avoid repeated freeze/thaw cycles.


A quick spin of the vial followed by gently mixing in distilled water to prepare a stock solution concentration not less than 0.1 mg/mL.

Avoid vigorous shaking or vortex



Insulin-like growth factor 1 receptor (IGF-1R/CD221) is a membrane-associated tyrosine kinase receptor that plays an important role in cell growth, transformation, and protection of cells from a variety of apoptotic stimuli. IGF-1R(CD221) is a tetrameric receptor consisting of two -subunits and two transmembrane β- subunits that are linked by disulfide bonds.The - subunits are extracellular and bind IGF. Each transmembrane β-subunit contains an intracellular tyrosine kinase domain. Binding of IGF-I or IGF-II ligand to IGF-1R leads to phosphorylation of three key tyrosine residues in the kinase domain, leading to phosphorylation of downstream substrates.

Related Publications:
autocrine igf-1/IGF-1R signalling is responsible for constitutive pi3k/akt activation in acute myeloid leukemia: therapeutic value of neutralizing anti-IGF-1R antibody
Haematologica, Dec 2009; 10.3324/haematol.2009.010785.
mir-29 micrornas regulate IGF-1R expression and contribute mantle cell lymphoma growth and survival.
Blood (ASH Annual Meeting Abstracts), Nov 2009; 114: 1957.
IGF-1R contributes to stress-induced hepatocellular damage in experimental cholestasis
Am. J. Pathol., Aug 2009; 175: 627 - 635.
expression levels of total IGF-1R and sensitivity of nsclc cells in vitro to an anti-IGF-1R antibody (r1507)
ASCO Meeting Abstracts, May 2009; 27: 8095.
effect of IGF-1R inhibitor bms-754807 on tumor glucose metabolism and proliferation in sal-igf xenografts by fdg and flt- pet imaging
ASCO Meeting Abstracts, May 2009; 27: e14501.

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