IGF-1 LR3 (1MG)
IGF-1 LR3 (1MG) lyophilized peptide for laboratory research. HPLC-verified ≥99% purity, batch-specific COA, American-manufactured. Ships 24h.
$77.00
Research Use Only. Not for human or veterinary use.
Documented reference chemistry.
IGF-1 LR3 — the Long-R3 IGF-1 analog (Arg³-IGF-1 with N-terminal extension) — supplied by BioFusion as a vacuum-sealed lyophilized 1mg vial for IGF-receptor and IGFBP-binding-displacement research chemistry.
Research context
IGF-1 LR3 (Long-R3 IGF-1) is an 83-residue research analog of native IGF-1 with two structural changes: an arginine substitution at position 3 (Arg³) that disrupts IGFBP-binding, and a 13-residue N-terminal extension that further reduces IGFBP affinity. The result is a research peptide with reduced binding-protein sequestration relative to native IGF-1 — making it a frequent reference standard in IGF-receptor binding and downstream-signaling research panels.
Synthesis & documentation
Produced by solid-phase peptide synthesis using Fmoc protecting-group strategy in a U.S.-based ISO 9001:2008 facility. Each lot is verified for identity (LC-MS), purity (reverse-phase HPLC-UV ≥99.0%), moisture (Karl Fischer), and counter-ion (ion chromatography). The signed Certificate of Analysis ships with every order; lot archive on the COA library.
Storage & handling
Lyophilized IGF-1 LR3 is stable at −20 °C for the printed shelf life. After reconstitution, the standard 14-day-at-2-8 °C reference window applies; avoid freeze-thaw cycling. At 83 residues with three intramolecular disulfide bridges, IGF-1 LR3 is sensitive to reducing-agent contamination — handle accordingly. The reconstitution calculator handles concentration math.
Why BioFusion
83-residue peptides with three disulfide bridges are at the upper bound of what SPPS can deliver at ≥99% purity — many third-party “IGF-1 LR3” listings are actually mis-folded or partially-reduced batches. BioFusion’s lots are verified for correct disulfide-bridge formation and ≥99.0% reverse-phase HPLC purity. Batch transparency ledger publishes per-release data. Bulk discounts at three+; members save 25%.
For research and laboratory use only. This product is not a drug, food, or cosmetic, and is not intended for diagnostic, therapeutic, or in vivo human use.
Keep lyophilized until needed.
Store the lyophilized vial cool and dry, away from light, until your protocol calls for it. In freeze-dried form the material stays stable for extended bench storage.
Reconstitute as needed with the diluent your method specifies, then keep the prepared solution refrigerated and use it within your validated window.
For laboratory and Research Use Only. Not for human or veterinary use.
Related reference standards.
