The growth hormone secretagogue receptor type 1a (GHS-R1a) is a G-protein-coupled receptor widely studied in endocrine signalling research. In-vitro binding assays characterise how ligands interact with it.
Common assay formats
- Radioligand competition binding to determine affinity (Ki).
- Calcium flux and IP-one assays for functional Gq signalling.
- BRET/FRET β-arrestin recruitment for biased-signalling profiles.
Why selective reference peptides matter
Ipamorelin is a pentapeptide valued in research for its selectivity at GHS-R1a. A selective reference ligand gives a clean positive control against which new compounds can be compared.
Design considerations
- Validate receptor expression in the cell line.
- Include vehicle and reference ligand controls on every plate.
- Run full concentration-response curves.
- Document peptide lot and reconstitution date.
Related reagents: Ipamorelin 10 mg reference standard. Each batch ships with documented HPLC purity and a Certificate of Analysis on request.
