IGFBP3 Human

IGFBP3 Human

  • Name
  • Description
  • Cat#
  • Pricings
  • Quantity
  • IGFBP3 Human

  • IGFBP3 Human Recombinant
  • CYT-300
  • Shipped at Room temp.

Catalogue number



GH-dependant binding protein, IBP3, BP-53, IGFBP-3.


IGFBP3 is a member of the IGFBP family and encodes a protein with an IGFBP domain and a thyroglobulin type-I domain. The protein forms a ternary complex with IGFALS and either IGF I or II. In this form, it circulates in the plasma, prolonging the half-life of IGFs and altering their interaction with cell surface receptors. Alternate transcriptional splice variants, encoding different isoforms, have been characterized.


IGFBP3 Human Recombinant produced in E.Coli is a non-glycosylated, polypeptide chain containing 264 amino acids and having a molecular mass of 28806 Dalton.
IGFBP-3 is purified by proprietary chromatographic techniques.


Escherichia Coli.

Physical Appearance

Sterile Filtered White lyophilized (freeze-dried) powder.


Lyophilized from a 0.2µm filtered concentrated (0.5mg/ml) solution in PBS, pH 7.4.


It is recommended to reconstitute the lyophilized IGFBP3 in sterile 20mM AcOH (acetic Acid) not less than 100µg/ml, which can then be further diluted to other aqueous solutions.


Lyophilized IBP3 although stable at room temperature for 3 weeks, should be stored desiccated below -18°C.
Upon reconstitution IGF-BP 3 should be stored at 4°C between 2-7 days and for future use below -18°C.
For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA).
Please prevent freeze-thaw cycles.


Greater than 97.0% as determined by:
(a) Analysis by RP-HPLC.
(b) Analysis by SDS-PAGE.

Amino acid sequence





Biological Activity

The ED50, calculated by by its ability to inhibit IGF-II induced proliferation of MCF-7 is < 200ng/ml in the presence of 15ng/ml of Human IGF-II, corresponding to a specific activity of 5.0 × 103 IU/mg.


ProSpec's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.

Safety Data Sheet


Title:The role of IGFBP3 in the growth inhibitory actions of androgens in LNCaP human prostate cancer cells.
Publication:Article first published online: 4 OCT 2007 DOI:10.1002/ijc.23100 Copyright © 2007 Wiley-Liss, Inc.
Link:IGFBP3 prospec publication

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