| Code | CSB-MP356436HU-WD |
| Abbreviation | Recombinant Human IGF1 protein (E51R) (Active) |
| MSDS | |
| Size | Inquiry |
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The E51R substitution in this IGF1 variant reduces binding to IGF-binding proteins while preserving receptor affinity, enabling researchers to isolate direct IGF1R-mediated signaling from IGFBP modulation in complex biological systems. Validated in a serum-free MCF-7 proliferation assay with an ED50 ≤1.5 ng/mL, this protein supports quantitative cell proliferation and survival studies, stem cell differentiation protocols requiring sustained IGF1R activation, and receptor-ligand competition assays designed to map binding epitopes or screen antagonists. Mammalian cell expression yields the full mature sequence spanning residues 49–118 with native post-translational modifications that support physiological receptor engagement. Purity exceeding 95% by SDS-PAGE and endotoxin levels ≤10 EU/mg satisfy the quality thresholds commonly required for in vitro mechanistic studies and ex vivo tissue culture models where IGFBP interference must be minimized.
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