IGFBP-4 Antibody (82334)

Recombinant Human IGFBP‑4 (Catalog # 804-GB) inhibits Recombinant Human IGF‑II (Catalog # 292-G2) induced proliferation in the MCF‑7 human breast cancer cell line in a dose-dependent manner (orange line). Inhibition of Recombinant Human IGF‑II (14 ng/mL) activity elicited by Recombinant Human IGFBP‑4 (0.3 µg/mL) is neutralized (green line) by increasing concentrations of Mouse Anti-Human IGFBP‑4 Monoclonal Antibody (Catalog # MAB804). The ND50 is typically 10‑40 µg/mL.

• Reactivity: Hu
• Applications: B/N
• Clone: 82334
• Clonality: Monoclonal
• Host: Mouse
• Conjugate: Unconjugated

IGFBP-4 Antibody (82334) Summary

• Immunogen: Mouse myeloma cell line NS0-derived recombinant human IGFBP‑4
  Asp22-Glu258
  Accession # AAA62670
• Specificity: Detects human IGFBP-4 in direct ELISAs and Western blots. In direct ELISAs and Western blots, no cross-reactivity with recombinant human (rh) IGFBP-1, rhIGFBP-2, or rhIGFBP-3 is observed.
• Source: N/A
• Isotype: IgG2b
• Clonality: Monoclonal
• Host: Mouse
• Gene: IGFBP4
• Purity Statement: Protein A or G purified from ascites
• Endotoxin Note: <0.10 EU per 1 μg of the antibody by the LAL method.

Applications/Dilutions

• Dilutions:
  • Neutralization 10-40 ug/mL

Packaging, Storage & Formulations

• Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.
• Buffer: Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.
• Preservative: No Preservative
• Reconstitution Instructions: Reconstitute at 0.5 mg/mL in sterile PBS.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for IGFBP-4 Antibody (82334)

• BP-4
• HT29-IGFBP
• IBP4insulin-like growth factor-binding protein 4
• IGF-binding protein 4
• IGFBP4
• IGFBP-4
• IGFBP-4IBP-4
• insulin-like growth factor binding protein 4

Background

Human IGF binding protein 4 (IGFBP-4) was isolated from human plasma based on its ability to bind immobilized IGF-I. Human IGFBP-4 cDNA encodes a 258 amino acid (aa) precursor protein with a predicted 21 aa signal peptide that is processed to generate the 237 aa mature human IGFBP-4. The human IGFBP-4 contains a potential N-linked glycosylation site and shares approximately 90% aa sequence identity with both the mouse and rat IGFBP-4. According to the nomenclature of IGFBPs defined at the 4th International Symposium of IGFs (1997, Tokyo), six high-affinity IGF binding proteins (IGFBP-1, -2, -3, -4, -5, -6) and four IGFBP-related proteins (IGFBPr-1, - 2, -3, -4) have been identified. All IGFBPs have a high cysteine content and share conserved cysteine residues that are clustered in the amino- and carboxy-terminal third of the molecule. IGFBPs have been shown to either inhibit or enhance the biological activities of IGF, or act in an IGF-independent manner. Post-translational modification of IGFBPs, including phosphorylation and proteolysis, have been shown to modify the affinities of the binding proteins for IGF and may indirectly regulate IGF actions.

1. Jones, J. I. and D.R. Clemons (1995) Endocrine Rev. 16:3.
2. Kelly, K.M. et al. (1996) Intl. J. Biochem. Cell Biol. 28:619.
3. Kim, H-S. et al. (1997) Proc. Natl. Acad. Sci. USA 94:12981.

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

Publications for IGFBP-4 Antibody (MAB804)(1)

Publication using MAB804

• Nakamura M, Miyamoto S, Maeda H, Ishii G, Hasebe T, Chiba T, Asaka M, Ochiai A Matrix metalloproteinase-7 degrades all insulin-like growth factor binding proteins and facilitates insulin-like growth factor bioavailability. Biochem. Biophys. Res. Commun., 2005-08-05;333(3):1011-6. 2005-08-05 [PMID: 15964556] (Western Blot, Human)

Bioinformatics

• Gene Symbol: IGFBP4
• Uniprot:
  • AAA62670()