IGFBP4 Protein (His Tag)

• Description:

  Insulin-like growth factor-binding protein 4 (IGFBP-4) is a 24-kDa protein that binds insulin-like growth factor 1 (IGF-1) and IGF-2 with high affinity and inhibits IGF action in vitro. The Insulin-like growth factor-binding protein also known as IGFBP serves as a carrier protein for Insulin-like growth factor 1. IGFBPs are distinct but are sharing regions with strong homology. All members of the IGFBP family bind IGF-I and IGF-II with about equal affinity. Insulin-like growth factor (IGF) binding proteins (IGFBPs) have been shown to either inhibit or enhance the action of IGF or act in an IGF-independent manner in the prostate. IGF-binding protein-4 (IGFBP-4) inhibits IGF-I action in vitro and is the most abundant IGFBP in the rodent arterial wall. Expression of IGFBP-4 mRNA in nontransgenic littermates was maximal in the liver and kidney. IGFBP-4 is a functional antagonist of IGF-I action on SMC. There is mounting evidence that the structure of the IGFBP proteins plays a key role in the regulation of IGF bioavailability, by modulating its molecular size, capillary membrane permeability, target tissue specificity, cell membrane adherence, and IGF affinity.

• Synonyms:

  Deb2 Protein; IBP-4 Protein; IGFBP-4 Protein; Igfbp4 Protein

• Accession Number:

  NP_034647.1

• Reactivity:

  Mouse

• Cross Reactivity:

  Mouse

• Label:

  His-Tag

• Assay Protocol:

  See Datasheet send with the product

• Endotoxin:

  < 1.0 EU per μg of the protein as determined by the LAL method

• Purity:

  > 95 % as determined by SDS-PAGE

• Bioactivity:

  Measured in a serum free cell proliferation assay using MCF7 human breast adenocarcinoma cells. The ED50 for this effect is typically 0.1-0.6 μg/mL.

• Length:

  244

• Form:

  Lyophilized

• Buffer:

  PBS, pH 7.4

• Reconstitution:

  See Datasheet

• Molecular Weight:

  38 kDa (glycosylated)

• Storage Conditions:

  Samples are stable for up to twelve months from date of receipt at -20°C to -80°C. Store it under sterile conditions at -20°C to -80°C. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.

• Host or Source:

  HEK 293 cells