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IGF-1 LR3 - available in 0.1mg. For laboratory research use only. Not for human or veterinary use.
IGF-1 LR3 (Long R3 IGF-1) is an 83-amino-acid recombinant analog of human insulin-like growth factor 1, expressed in E. coli. It differs from the native 70-residue protein in two ways: an arginine replaces glutamate at position 3 of the IGF-1 sequence (the “R3”), and a 13-residue N-terminal extension derived from porcine growth hormone remains attached (the “Long”). It has the molecular formula C400H619N111O115S9, a molecular weight of approximately 9,111.5 g/mol with its three disulfide bonds formed, and CAS number 143045-27-6. In the primary literature the Arg3 substitution is reported to greatly reduce binding to IGF-binding proteins while largely preserving binding to the type-1 IGF receptor. Supplied as a white lyophilized powder, reconstituted in dilute acetic acid, stored refrigerated at 2–8 °C.
This product is strictly for research purposes only.
The Helix Standard
Every product on this page, and every batch behind it, clears the same six checkpoints before it’s listed for sale.
99.9% verified purity, third-party HPLC tested, published as a certificate of analysis.
Every batch traceable from synthesis to dispatch, four checkpoints documented.
Each batch is lab-tested for purity, verified for identity, and screened for contaminants.
Manufactured in a cGMP facility in Texas with quality-verified standards for dependable research sourcing.
99.9% purity · COA included
$30.00
Save from 3+ · As low as $25.50/vial
Peptides in lyophilized powder form (unreconstituted) should be stored at freezer temperatures of 17°F (-8°C) to -4°F (-20°C) for long term storage of 1-2+ years for minimal degradation. Reconstituted peptides should be refrigerated at 36°- 42°F.
Our peptides are in lyophilized (freeze-dried) vials. Lyophilization is a process that significantly increases the stability and shelf life of compounds. Short term temperature variations during transit times will not affect the integrity of the peptide and should still keep purity at 99%.
Orders ship the same day if placed before 1PM EST or the next day if placed after. Orders over $200 qualify for free Fedex 2-Day shipping. We also offer an insulated shipping option with a styrofoam lining and a large ice pack. Other couriers are available upon request (USPS or UPS).
We maintain the highest standards for quality and purity by manufacturing our research peptides in a GMP facility, ensuring strict adherence to Good Manufacturing Practices (GMP). Each batch undergoes rigorous Quality Control (QC) testing to verify purity, potency, and safety. We partner with trusted analytical testing laboratories to assess:
Our commitment to precision and safety guarantees that every peptide meets stringent quality standards, delivering reliable and effective results.
We maintain the highest standards for quality and purity by manufacturing our research peptides in a GMP facility, ensuring strict adherence to Good Manufacturing Practices (GMP). Each batch undergoes rigorous Quality Control (QC) testing to verify purity, potency, and safety. We partner with trusted analytical testing laboratories to assess:
Our commitment to precision and safety guarantees that every peptide meets stringent quality standards, delivering reliable and effective results.
We offer some of the most competitive pricing on the market with rates up to 30% lower than the industry average. Our tiered pricing ranges from an additional 5% to 25% off and more for wholesale.
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