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IGF-I (Insulin-like Growth Factor-I)

Product Description:

The IGFs are mitogenic, polypeptide growth factors that stimulate the proliferation and survival of various cell types, including muscle, bone, and cartilage tissue in vitro. IGFs 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 to insulin by structure and function, but have a much higher growth-promoting activity than insulin. IGF-II expression is influenced by placenta lactogen, while IGF-I expression is regulated by growth hormone. Both IGF-I and IGF-II signal through the tyrosine kinase type I receptor (IGF-IR), but IGF-II can also signal through the IGF-II/Mannose-6-phosphate receptor. 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 3 intra-molecular disulfide bonds.

Technical Specifications:

• Species: Human
• Expression: E. coli Cell Expressed
• Activity: Typically ≤2.0 ng/mL ED50
• Purity: >98%
• Endotoxin: <1.0 EU/μg
• Molecular Mass: 7.6 kDa
• Country of Origin: USA

Purity Confirmation:

This was determined by SDS-PAGE gel and HPLC analysis.

Activity Assay:

Determined by a cell proliferation assay using FDC-P1 cells.

AA Sequence:

Reconstitution Buffer:

Centrifuge the vial prior to opening. Reconstitute in water to a concentration of 0.1-1.0 mg/ml. Do not vortex.

Storage:

For extended storage, it is recommended to further dilute in a buffer containing a carrier protein (example 0.1% HSA) and store in working aliquots at -20°C to -80°C.