IGF-1 LR3

IGF-1 LR3 (Long R3 IGF-1) is an 83-amino-acid recombinant analogue of human insulin-like growth factor 1, carrying an arginine for glutamate substitution at position 3 of the IGF-1 sequence and a 13-residue N-terminal extension, used in growth factor and cell culture research. Every lot is finished in the United States from imported peptide API (purified, filled and lyophilized domestically) and tested by an independent laboratory, with the full Certificate of Analysis published and searchable by lot number once the lot ships.

Identity at a glance

• Sequence: MFPAMPLSSLFVNGPRTLCGAELVDALQFVCGDRGFYFNKPTGYGSSSRRAPQTGIVDECCFRSCDLRRLEMYCAPLKPAKSA (83 residues, per the FDA Global Substance Registration System record for UNII M9L22Y19H9)
• Parent protein: human IGF-1, UniProt P05019
• CAS number: 143045-27-6 (the registry entry associated with the UNII; the number 946870-92-4 quoted by some vendors resolves in PubChem to an unrelated lipid and is not used here)
• PubChem CID: none; proteins of this size are not carried as PubChem compound records
• Appearance: white lyophilized powder

IGF-1 LR3 is a protein rather than a short peptide, so its identity rests on the sequence and the mass spectrometry section of the lot certificate.

How it is tested

IGF-1 LR3 is tested the same way as every product we sell: an independent laboratory (Horizon Analytical) runs ultra-high-performance liquid chromatography for chromatographic purity by area normalization, and mass spectrometry for identity, with the observed mass compared against the calculated mass for the 83-residue sequence. The certificate for your lot is published on our register, searchable by the lot number on your paperwork.

Verify the Certificate of Analysis for your lot

New to reading a certificate? Our guide on how to read a COA walks through every section.

For Research Use Only. This product is not intended for human or veterinary use, diagnosis, or treatment. Not a drug, supplement, or medical device. Not evaluated by the FDA. For qualified research applications only.

Related compounds in the catalog: Sermorelin, Tesamorelin, Hexarelin, Ipamorelin, CJC-1295 with DAC.