IGF-1 LR3 1 mg

What is IGF-1 LR3?

IGF-1 LR3 is an 83-amino-acid analogue of insulin-like growth factor 1, carrying an arginine substitution at position 3 and a 13-residue N-terminal extension. Both changes reduce its affinity for IGF binding proteins, so more of it stays free in a culture system than native IGF-1 would. Pepstral supplies it as a lyophilized powder for in-vitro laboratory research only.

→Read the full IGF-1 LR3 research guide

What is IGF-1 LR3 studied for?

• IGF-1 receptor binding assays
• Cell proliferation and differentiation models
• Binding-protein interaction studies
• Comparisons against native IGF-1

All applications above are in-vitro or preclinical research contexts. IGF-1 LR3 is sold for laboratory research only and is not for human or animal use.

What does the certificate for lot IGF1-0803 show?

Every lot of IGF-1 LR3 is tested by an independent US laboratory before it is listed. The report for lot IGF1-0803 is in the COA library and the lot number printed on the vial matches it. The current results:

How is IGF-1 LR3 handled and stored?

Sealed vials are stored at -20°C away from light and keep for 24 months. To reconstitute, add bacteriostatic water slowly down the inside wall of the vial and swirl until clear; never shake. Once in solution, keep at 2 to 8°C and use within our 28-day default for a preserved solution. The concentration table gives the dilution volumes and microlitre aliquots for this vial.

Frequently asked questions

Related reading

• Filter-sterilising a peptide solution: why 0.22 micron, which membrane, and what it costs you0.22 micron is the standard sterilising pore size. Which membrane to choose, how much peptide the filter takes, and when filtering is the wrong call.
• IGF-1 LR3: what the Long-R3 changes do, and what a 1 mg certificate showsIGF-1 LR3 carries an arginine at position 3 and 13 extra N-terminal residues. What those changes do, and what a 1 mg certificate reports.
• Which residues degrade first: a map of peptide breakdown chemistry, and what it says about this catalogueSix degradation routes, each tied to one residue. Across 13 catalogue sequences the dominant route is not the one textbooks lead with.
• Pinealon (Glu-Asp-Arg): the sequence, the certificate for lot PINE20-0803, and what the research actually measuredPinealon is Glu-Asp-Arg, mass 418.4, a 20 mg vial at $60. Lot PINE20-0803 line by line, molecules in 20 mg, what the research measured, and handling.