| Code | CSB-AP002491HU |
| Abbreviation | Recombinant Human IGFBP3 protein (Active) |
| MSDS | |
| Size | $142 |
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IGFBP-3 is the principal carrier of circulating IGF-I and IGF-II, making its binding activity central to studies of IGF axis regulation in cancer biology. This tag-free recombinant human IGFBP3 (28–291 aa, full-length mature protein) demonstrates confirmed biological function, with an ED50 below 200 ng/mL in inhibiting IGF-II-driven proliferation of serum-free MCF-7 cells, corresponding to a specific activity exceeding 5.0 × 10³ IU/mg — data that supports use in ligand-binding and cargo-release assays, drug-protein interaction studies, and membrane transporter functional experiments. The protein's conformational integrity, validated through this cell-based proliferation assay, also provides a suitable basis for structural and biophysical characterization as well as antibody development and deployment as an ELISA standard. Produced in *E. coli* at greater than 98% purity by SDS-PAGE with endotoxin levels below 1.0 EU/μg, this preparation meets the quality thresholds commonly required for sensitive cell-based and immunoassay workflows.
Applications : Partial correlation analysis
Review: Correlation between IGF-1 and IGFBP-3 in the BC patients serum. The results of partial correlation analysis showed that the levels in serum for IGFBP-3, IGF-1 were positively correlated in BC patients (1=0.970, P<0.001).
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