SRP3069 Sigma-Aldrich

IGF-I human

Animal-component free, recombinant, expressed in E. coli, ≥98% (SDS-PAGE), ≥98% (HPLC), cell culture tested

Synonym: IGF-IA, Somatamedin C



Related Categories Cell Biology, Cell Culture, Cell Signaling and Neuroscience, Cytokines and Growth Factors, Cytokines, Growth Factors and Hormones,
biological source   human
recombinant   expressed in E. coli
assay   ≥98% (HPLC)
  ≥98% (SDS-PAGE)
form   lyophilized
potency   ≤2.0 ng/mL ED50
mol wt   mol wt 7.6 kDa
packaging   pkg of 100 μg
impurities   <0.1 EU/μg endotoxin, tested
color   white to off-white
suitability   cell culture tested
UniProt accession no.   P05019
shipped in   wet ice
storage temp.   −20°C
Gene Information   human ... IGF1(3479)



Centrifuge the vial prior to opening. Reconstitute in water to a concentration of 0.1-1.0 mg/ml. Do not vortex. This solution can be stored at 2-8°C for up to 1 week. For extended storage, it is recommended to further dilute in a buffer containing a stabilizer (example 5% Trehalose) and store in working aliquots at -20°C to -80°C.

Physical form

Lyophilized with no additives.


In broiler chicks, IGF-I human has been used to study the effect of fadrozole and IGF-1 on female-to-male sex reversal and body weight.

Biochem/physiol Actions

The IGFs (insulin like growth factors) are mitogenic polypeptide growth factors that stimulate the proliferation and survival of various cell types including muscle, bone, and cartilage tissue in vitro. IGF1 is an essential component for embryonic and postnatal skeletal development. Absence of IGF1 in mice negatively affects bone development, causes hypomineralization of skeletons and growth plate disturbances. It is also associated with cancer progression. It can suppress cell death and provides resistance to chemotherapy as well as radiation therapy.

General description

IGFs (insulin like growth factors) are predominantly produced by the liver, although a variety of tissues produce the IGFs at distinctive times. The IGFs belong to the Insulin gene family, which also contains insulin and relaxin. The IGFs are similar by structure and function to insulin, but have a much higher growth-promoting activity than insulin. IGF-I expression is regulated by growth hormone. IGF-I signal through the tyrosine kinase type I receptor (IGF-IR). Mature IGFs are generated by proteolytic processing of inactive precursor proteins, which contain N-terminal and C-terminal propeptide regions. Recombinant human IGF-I and IGF-II are globular proteins containing 70 and 67 amino acids, respectively, and three intra-molecular disulfide bonds.



Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 


Certificate of Analysis

Request a Serum Sample

Cell Culture Guide
Protocols & Articles

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