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I4657 Sigma-Aldrich

Insulin-like Growth Factor-I Receptor human

≥95% (SDS-PAGE), recombinant, expressed in NSO cells, lyophilized powder

Synonym: IGF-I Receptor



Related Categories Cell Biology, Cell Culture, Cell Signaling and Neuroscience, Cytokines and Growth Factors, Cytokines, Growth Factors and Hormones,
Quality Level   200
biological source   human
recombinant   expressed in NSO cells
assay   ≥95% (SDS-PAGE)
form   lyophilized powder
mol wt   α-chain ~120 & 150 kDa
  β subunit ~46 & 50 kDa
packaging   pkg of 50 μg
impurities   endotoxin, tested
UniProt accession no.   P08069
storage temp.   −20°C
Gene Information   human ... IGF1R(3480)


General description

IGF1R (insulin-like growth factor I) is a receptor tyrosine kinase. The gene is mapped to human chromosome 15q26. It is expressed in various solid tumors as well as hematologic malignancies.


Insulin-like growth factor-I receptor human has been used to study the binding constants of estradiol to insulin, insulin receptors and insulin-like peptides.

Biochem/physiol Actions

IGF-I receptor, a tyrosine kinase receptor with signal transduction pathways, is comprised of two α and two β subunits. IGF-I receptor binds IGF-I with high affinity, IGF-II with lower affinity, and insulin with weak affinity.

Physical form

Lyophilized from a 0.2 μm solution in phosphate buffered saline.

Analysis Note

As a result of glycosylation in SDS-PAGE under reducing conditions, the recombinant α subunit migrates as a doublet of ~120 kDa and 150 kDa and the β subunit migrates as doublet of ~46 kDa and 50 kDa.

The biological activity is measured by its ability to bind human IGF­-­I in a functional ELISA assay.

Safety & Documentation

Safety Information

Personal Protective Equipment 
NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Protocols & Articles


Huntington's Disease

Huntington's disease (HD) is an autosomal dominant, late-onset neurodegenerative disorder characterized by a selective neuronal cell death in the cortex and striatum leading to cognitive dysfunction,...
Carolyn L. Crankshaw
BioFiles v7 n2, 2011, 9–14
Keywords: Apoptosis, Huntington Disease, Transcription

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