IGF-1 LR3 (0.1mg)

Native IGF-1 is the secreted ligand at the type 1 IGF receptor. The NCBI IGF1 gene record is the identity file for that parent protein. Long R3 IGF-I is the analog built on top of it.^[1]

The 13-residue N-terminal extension and the Arg3 substitution are why vendors and papers call the material Long R3. Those edits reduce sequestration by IGF-binding proteins in culture, which is why many receptor and IGFBP-competition protocols use Long R3 instead of the 70-residue ligand. Write the analog name into the plate map.

No. igf-1 lr3 is a peptide growth-factor analog. Forum threads still file it next to steroids because both show up in body-composition talk.

A 70- to 83-residue protein analog and a tetracyclic androgen do not share a receptor, a scaffold, or an assay. If the protocol needs an androgen-receptor control, use one.

The analog shows up in IGF-1 receptor binding, phosphorylation readouts, and IGFBP-competition work because the Arg3 swap and the N-terminal extension change how much ligand stays free of binding proteins.^[1]

That is a biochemical identity claim. A culture EC50 from one cell line does not become a catalog schedule. If the method needs native IGF-1 as the reference ligand, order that sequence. If it needs Long R3, match the COA sequence to Long R3.

HGH 191aa is a pituitary hormone that acts at the GH receptor. IGF-1 is a downstream ligand. Long R3 IGF-I is a modified form of that ligand. Same axis. Different molecules.

Semaglutide is a GLP-1 receptor agonist. Shared metabolic-peptide marketing does not make a growth-factor analog and an incretin analog the same control.

igf-1 lr3 price is a procurement field. An igf-1 peptide for sale listing without a lot number that matches the vial is a catalog sentence.

Tetrava lists 0.1 mg and 1 mg lyophilized vials. Check the Certificate of Analysis for HPLC-MS identity, purity by area-under-curve, and a lot that matches the label. A generic PDF reused across strengths is not that.

The 0.1 mg vial and the 1 mg vial are the same Long R3 sequence at two fill masses.^[1] Mature IGF-1 is 70 residues. Long R3 is that chain plus the 13-residue N-terminal extension, which is why some plates call it an 83-residue analog. Receptor-binding and IGFBP-competition plates often want different working concentrations. That is a dilution-math problem.

Ships lyophilized. Store sealed vials at -20 C. Skip repeated freeze-thaw. Log diluent lot, concentration, date, and operator so the prep still matches the batch COA.