RecombinantIGF-BP-4, His, Human
Insulin-like growth factor-binding protein 4 (IGF-BP-4), also known as IBP-4, is a secreted glycoprotein belonging to the IGFBP family. IGF-BP-4 is produced by osteoblasts, epidermis, ovarian follicles and other tissues. It binds both insulin-like growth factor (IGF) I and II, and it circulates in the plasma in both glycosylated and non-glycosylated forms. IGF-BP-4 prolongs the half-life of the IGFs and has been shown to inhibit or stimulate the growth-promoting effects of the IGFs. Pregnancy Associated Plasma Protein A (PAPP-A) proteolytically cleaves IGF-BP-4 and reduces its affinity to bind IGFs, and thus serves as an important regulator of IGF-BP-4 function.
Product Specifications
Product Name Alternative
Insulin-like Growth Factor-Binding Protein 4, IBP-4, HT29-IGF-BP, colon cancer cell growth inhibitor
Source
HEK 293
Field of Research
Signal Transduction
Endotoxin
< 0.2 EU/μg, determined by LAL method.
Purity
> 95% as analyzed by SDS-PAGE.
Bioactivity
ED50 < 50 ng/ml, measured in a bioassay using FDC-P1 cells in the presence of 15ng/ml human IGF-II.
Form
Lyophilized after extensive dialysis against PBS.
Molecular Weight
30-35 kDa, observed by reducing SDS-PAGE.
Storage Conditions
Notes
For research use only.
Applications Notes
Reconstituted in ddH2O or PBS at 100 μg/ml.
Preservative
Lyophilized after extensive dialysis against PBS.
AA Sequence
Available Sizes
Frequently Asked Questions
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