OP Labs formerly Oxford Peptides. Batch HPLC tested at 98.5%+ purity. Store frozen long term or in fridge when ready to be used Sold for research purposes only. Contact us for Wholesale Orders.
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GHRP-2
Synonyms / Designations: GHRP-2, Growth Hormone Releasing Peptide-2, Pralmorelin, KP-102. CAS Number: 158861-67-7. Molecular Formula: C45H55N9O6 Molecular Weight: ~818.0 g/mol. Purity: ≥ 99 % (HPLC). Appearance: White to off-white lyophilised powder. Pack Size: 10 mg (total). Storage: Desiccated, protected from light, stored at –20 °C or below. Solubility: Soluble in water and buffered aqueous solutions (e.g. PBS).
Description & Mechanism
GHRP-2 is a synthetic hexapeptide belonging to the class of growth hormone secretagogues, widely utilised in biochemical and physiological research to study receptor-mediated signalling within the hypothalamic–pituitary axis. It functions primarily as an agonist of the growth hormone secretagogue receptor (GHS-R1a), a G-protein-coupled receptor expressed in both central and peripheral tissues.
In cellular and in vivo research systems, GHRP-2 activates GHS-R1a independently of endogenous growth hormone-releasing hormone (GHRH), leading to downstream intracellular signalling cascades involving calcium mobilisation and modulation of second messenger pathways. These effects make GHRP-2 a useful molecular tool for investigating receptor activation dynamics, neuroendocrine regulation, and peptide–receptor interactions.
In preclinical research settings, exposure to GHRP-2 has been associated with altered signalling along the hypothalamic–pituitary axis, with downstream effects dependent on experimental model, dose, and exposure conditions. As such, GHRP-2 is commonly employed in mechanistic studies exploring peptide hormone signalling and receptor pharmacology.
Applications in Research
As a molecular probe to study growth hormone secretagogue receptor (GHS-R1a) activation Investigation of neuroendocrine signalling pathways within the hypothalamic–pituitary axis In cell-based assays examining GPCR-mediated signal transduction and calcium flux In animal or ex vivo experimental models for mechanistic studies of peptide hormone signalling As a reference compound in receptor binding, agonist profiling, and structure–activity studies
Specifications Summary
Parameter Typical Value / Range Purity (HPLC) ≥ 99 % Appearance White to off-white lyophilised powder Molecular Weight ~818.0 g/mol Peptide Type Synthetic hexapeptide Solubility Water, buffered aqueous solutions Storage –20 °C, desiccated, dark Pack Size 3000 mg (research scale); bulk available
Handling, Reconstitution & Stability
Weigh under dry conditions; peptide is hygroscopic Reconstitute in sterile water or appropriate buffered aqueous solution depending on assay requirements. Filter sterilize if required (e.g. 0.22 μm) immediately prior to use. Aliquot reconstituted solutions and store at –20 °C or below to minimise degradation Avoid repeated freeze–thaw cycles. Inspect for precipitation or pH changes prior to use in sensitive assays.
Precautions & Notes
GHRP-2 activity is concentration-dependent; appropriate dose–response controls are recommended. Peptide stability may be influenced by pH, temperature, and prolonged aqueous exposure.. Light and elevated temperatures may contribute to degradation; store under protective conditions. Intended strictly for laboratory research use; not for human or veterinary application.
References
Bowers C.Y. et al. Growth hormone–releasing peptide (GHRP). Cellular and Molecular Life Sciences. https://pubmed.ncbi.nlm.nih.gov/10604470/
Howard A.D. et al. A receptor in pituitary and hypothalamus that functions in growth hormone release. Science. https://pubmed.ncbi.nlm.nih.gov/8700211/
Ghigo E. et al. Growth hormone–releasing peptides. European Journal of Endocrinology. https://pubmed.ncbi.nlm.nih.gov/9010514/
Kojima M. et al. Ghrelin is a growth hormone–releasing acylated peptide from stomach. Nature. https://pubmed.ncbi.nlm.nih.gov/10541310/
Keywords: GHRP-2, GHRP2, Pralmorelin, Growth Hormone Releasing Peptide-2
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