Recombinant Human Insulin-like Growth Factor-Binding Protein 4, Insect Cells Derived (Human IGF-BP4)_C230374

Description

IGF-BPs control the distribution, function and activity of IGFs in various cell tissues and body fluids. IGF-BP4 is the major IGF-BP produced by osteoblasts, and is found in the epidermis, ovarian follicles,  and other tissues.  IGF-BP4 inhibits the activity  of IGF-I and IGF-II by binding in a manner that results in the formation of complexes with reduced ability to signal through cell surface IGF receptors. IGF-BP4 can inhibit the growth of chick pelvis cartilage and HT29 colon adenocarcinoma  cells  by  blocking  the mitogenic actions of IGFs, and has also been shown to reduce colony formation by colorectal cancer cells via an IGF-independent pathway. The biological effects of IGF-BP4 can be regulated by Pregnancy Associated Plasma Protein A (PAPP-A), which reduces IGF-BP4/IGF binding affinity by proteolytically cleaving IGF-BP4. The modulation of IGF-BP4 activity by  PAPP-A  is  an important component in the regulation of ovarian folliculogenesis and  in  the  growth  inhibition  of  responding  ovarian  cancer cells. Recombinant Human IGF-BP4 is a 25.7 kDa protein consisting of 237 amino acid residues including, the IGF-BP domain and thyroglobulin type-I domain.

 

Product Properties

Synonyms

Insulin-like Growth Factor-Binding Protein 4, IBP-4, HT29-IGF-BP, colon cancer cell growth inhibitor

Accession

P22692

GeneID

3487

Source

Insect Cell-derived Human IGF-BP4 protein,Asp22-Glu258.

Molecular Weight

Approximately 30 kDa.

AA Sequence

DEAIHCPPCS EEKLARCRPP VGCEELVREP GCGCCATCAL GLGMPCGVYT PRCGSGLRCY PPRGVEKPLH TLMHGQGVCM ELAEIEAIQE SLQPSDKDEG DHPNNSFSPC SAHDRRCLQK HFAKIRDRST SGGKMKVNGA PREDARPVPQ GSCQSELHRA LERLAASQSR THEDLYIIPI PNCDRNGNFH PKQCHPALDG QRGKCWCVDR KTGVKLPGGL EPKGELDCHQ LADSFRE

Tag

None

Physical Appearance

Sterile Filtered White lyophilized (freeze-dried) powder.

Purity

> 97 % by SDS-PAGE and HPLC analyses.

Biological Activity

Fully biologically active when compared to standard. The ED50 as determined by its ability to inhibit IGF-II induced proliferation of MCF-7 cells is less than 0.1 μg/mL, corresponding to a specific  activity  of > 1.0 × 104 IU/mg in the presence of 14 ng/ml of rHuIGF-II.

Endotoxin

< 0.1 EU per 1μg of the protein by the LAL method.

Formulation

Lyophilized from a 0.2 μm filtered concentrated solution in 20mM Tris-HCl, pH 8.0, 150mM NaCl.

Reconstitution

We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute in sterile distilled water or aqueous buffer containing 0.1 % BSA to a concentration of 0.1-1.0 mg/mL. Stock solutions should be apportioned into working aliquots and stored at ≤ -20 °C. Further dilutions should be made in appropriate buffered solutions.

 

Shipping and Storage

The products are shipped with ice pack and can be stored at -20℃ to -80℃ for 1 year.

Recommend to aliquot the protein into smaller quantities when first used and avoid repeated freeze-thaw cycles.

 

Cautions

1. Avoid repeated freeze-thaw cycles.

2. For your safety and health, please wear lab coats and disposable gloves for operation.

3. For research use only!

Recombinant Human Insulin-like Growth Factor-Binding Protein 4, Insect Cells Derived (Human IGF-BP4)_C230374

Product form

SKU: C230374E

$74.00

      • Tell a unique detail about this product

      Description

      IGF-BPs control the distribution, function and activity of IGFs in various cell tissues and body fluids. IGF-BP4 is the major IGF-BP produced by osteoblasts, and is found in the epidermis, ovarian follicles,  and other tissues.  IGF-BP4 inhibits the activity  of IGF-I and IGF-II by binding in a manner that results in the formation of complexes with reduced ability to signal through cell surface IGF receptors. IGF-BP4 can inhibit the growth of chick pelvis cartilage and HT29 colon adenocarcinoma  cells  by  blocking  the mitogenic actions of IGFs, and has also been shown to reduce colony formation by colorectal cancer cells via an IGF-independent pathway. The biological effects of IGF-BP4 can be regulated by Pregnancy Associated Plasma Protein A (PAPP-A), which reduces IGF-BP4/IGF binding affinity by proteolytically cleaving IGF-BP4. The modulation of IGF-BP4 activity by  PAPP-A  is  an important component in the regulation of ovarian folliculogenesis and  in  the  growth  inhibition  of  responding  ovarian  cancer cells. Recombinant Human IGF-BP4 is a 25.7 kDa protein consisting of 237 amino acid residues including, the IGF-BP domain and thyroglobulin type-I domain.

       

      Product Properties

      Synonyms

      Insulin-like Growth Factor-Binding Protein 4, IBP-4, HT29-IGF-BP, colon cancer cell growth inhibitor

      Accession

      P22692

      GeneID

      3487

      Source

      Insect Cell-derived Human IGF-BP4 protein,Asp22-Glu258.

      Molecular Weight

      Approximately 30 kDa.

      AA Sequence

      DEAIHCPPCS EEKLARCRPP VGCEELVREP GCGCCATCAL GLGMPCGVYT PRCGSGLRCY PPRGVEKPLH TLMHGQGVCM ELAEIEAIQE SLQPSDKDEG DHPNNSFSPC SAHDRRCLQK HFAKIRDRST SGGKMKVNGA PREDARPVPQ GSCQSELHRA LERLAASQSR THEDLYIIPI PNCDRNGNFH PKQCHPALDG QRGKCWCVDR KTGVKLPGGL EPKGELDCHQ LADSFRE

      Tag

      None

      Physical Appearance

      Sterile Filtered White lyophilized (freeze-dried) powder.

      Purity

      > 97 % by SDS-PAGE and HPLC analyses.

      Biological Activity

      Fully biologically active when compared to standard. The ED50 as determined by its ability to inhibit IGF-II induced proliferation of MCF-7 cells is less than 0.1 μg/mL, corresponding to a specific  activity  of > 1.0 × 104 IU/mg in the presence of 14 ng/ml of rHuIGF-II.

      Endotoxin

      < 0.1 EU per 1μg of the protein by the LAL method.

      Formulation

      Lyophilized from a 0.2 μm filtered concentrated solution in 20mM Tris-HCl, pH 8.0, 150mM NaCl.

      Reconstitution

      We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute in sterile distilled water or aqueous buffer containing 0.1 % BSA to a concentration of 0.1-1.0 mg/mL. Stock solutions should be apportioned into working aliquots and stored at ≤ -20 °C. Further dilutions should be made in appropriate buffered solutions.

       

      Shipping and Storage

      The products are shipped with ice pack and can be stored at -20℃ to -80℃ for 1 year.

      Recommend to aliquot the protein into smaller quantities when first used and avoid repeated freeze-thaw cycles.

       

      Cautions

      1. Avoid repeated freeze-thaw cycles.

      2. For your safety and health, please wear lab coats and disposable gloves for operation.

      3. For research use only!

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