膜杰作
Star Staining
分子别名（Synonym）
IGF-I,IGF1A,somatomedin C,MGF
表达区间及表达系统（Source）
Human IGF-I Protein, Fc Tag (IG1-H5263) is expressed from human 293 cells (HEK293). It contains AA Gly 49 - Ala 118 (Accession # P05019-1).
Predicted N-terminus: Phe
Request for sequence
蛋白结构（Molecular Characterization）
This protein carries a human IgG1 Fc tag at the N-terminus.
The protein has a calculated MW of 34.1 kDa. The protein migrates as 38-40 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE) due to glycosylation.
内毒素（Endotoxin）
Less than 1.0 EU per μg by the LAL method.
纯度（Purity）
>90% as determined by SDS-PAGE.
>90% as determined by SEC-MALS.
制剂（Formulation）
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 with trehalose as protectant.
Contact us for customized product form or formulation.
重构方法（Reconstitution）
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
存储（Storage）
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
- -20°C to -70°C for 12 months in lyophilized state;
- -70°C for 3 months under sterile conditions after reconstitution.
电泳（SDS-PAGE）
Human IGF-I Protein, Fc Tag on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 90% (With Star Ribbon Pre-stained Protein Marker).
SEC-MALS
The purity of Human IGF-I Protein, Fc Tag (Cat. No. IG1-H5263) is more than 90% and the molecular weight of this protein is around 68-82 kDa verified by SEC-MALS.
Report
活性（Bioactivity）-ELISA
Immobilized Human IGF-I Protein, Fc Tag (Cat. No. IG1-H5263) at 5 μg/mL (100 μL/well) can bind Biotinylated Human IGFBP-4 Protein, His,Avitag (Cat. No. IG4-H82E3) with a linear range of 0.005-0.078 μg/mL (QC tested).
Protocol
Immobilized Human IGFBP-3, His Tag (Cat. No. IG3-H52H9) at 5 μg/mL (100 μL/well) can bind Human IGF-I Protein, Fc Tag (Cat. No. IG1-H5263) with a linear range of 0.3-5 ng/mL (Routinely tested).
Protocol
Immobilized Human IGF-I R, His Tag (Cat. No. IGR-H5229) at 5 μg/mL (100 μL/well) can bind Human IGF-I Protein, Fc Tag (Cat. No. IG1-H5263) with a linear range of 0.01-0.156 μg/mL (Routinely tested).
Protocol
背景（Background）
Insulin-like growth factor 1 (IGF-1 or IGF-I), also known as somatomedin C, is the dominant effector of growth hormone and is structurally homologous to proinsulin. Human IGF-1 is synthesized as two precursor isoforms with N- and alternate C‑terminal propeptides (1). These isoforms are differentially expressed by various tissues (1). The 7.6 kDa mature IGF‑1 is identical between isoforms and is generated by proteolytic removal of the N- and C‑terminal regions. Mature human IGF-1 shares 94% and 96% aa sequence identity with mouse and rat IGF-1, respectively (2), and exhibits cross-species activity. It shares 64% aa sequence identity with mature human IGF2. Circulating IGF-1 is produced by hepatocytes, while local IGF-1 is produced by many other tissues in which it has paracrine effects (1). IGF-1 induces the proliferation, migration, and differentiation of a wide variety of cell types during development and postnatally (3). IGF-1 regulates glucose and fatty acid metabolism, steroid hormone activity, and cartilage and bone metabolism (4‑7). It plays an important role in muscle regeneration and tumor progression (1, 8). IGF-1 binds IGF1R, IGF2R, and the insulin receptor, although its effects are mediated primarily by IGF1R (9). IGF-1 association with IGF binding proteins increases its plasma half‑life and modulates its interactions with receptors (10).
