High-purity GHRP-2 (Growth Hormone Releasing Peptide-2) is an essential research tool for evaluating growth hormone secretagogue receptor mechanics and anterior pituitary signaling. PX1 Research supplies laboratory-grade GHRP-2 manufactured under strict analytical standards, complete with lot-specific RP-HPLC purity verification and mass spectrometry documentation.
High-purity GHRP-2 (Growth Hormone Releasing Peptide-2) is an essential research tool for evaluating growth hormone secretagogue receptor mechanics and anterior pituitary signaling. PX1 Research supplies laboratory-grade GHRP-2 manufactured under strict analytical standards, complete with lot-specific RP-HPLC purity verification and mass spectrometry documentation.
Principal investigators searching for GHRP-2 peptide online kopen must prioritize verified analytical documentation over commercial availability. High-purity GHRP-2 (Growth Hormone Releasing Peptide-2) intended for in vitro assays or preclinical animal models requires rigorous independent verification, including High-Performance Liquid Chromatography (HPLC) showing purity equal to or exceeding 98%, Electrospray Ionization Mass Spectrometry (ESI-MS) confirming exact molecular mass, and Limulus Amebocyte Lysate (LAL) assays verifying low endotoxin thresholds.
When procurement officers and laboratory directors evaluate options to order peptides online, obtaining lot-specific Certificates of Analysis (COAs) is critical to maintaining experimental integrity. Substandard reagents containing residual trifluoroacetic acid (TFA), uncoupled amino acid fragments, or microbial endotoxins can severely compromise cell culture viability and skew signal transduction measurements. At PX1 Research, every batch of our GHRP-2 research peptide is synthesized in GMP-compliant facilities and tested by ISO 17025 accredited third-party laboratories to guarantee analytical consistency.
GHRP-2, systematically designated as D-Ala-D-2-Nal-Ala-Trp-D-Phe-Lys-NH2, is a synthetic hexapeptide classified within the growth hormone secretagogue (GHS) family. Possessing a molecular formula of C45H55N9O6 and a molecular weight of 818.0 g/mol, GHRP-2 was engineered to optimize binding kinetics at the growth hormone secretagogue receptor type 1a (GHS-R1a) compared to early-generation hexapeptides.
The inclusion of unnatural D-amino acids—specifically D-alanine, D-2-naphthylalanine, and D-phenylalanine—confers significant enzymatic stability against systemic peptidases. This structural modification extends the peptide's half-life in biological buffers and plasma matrices, making it a valuable tool for kinetic profiling in pituitary culture systems. Investigators exploring structural modifications across the growth hormone secretagogues category frequently analyze these D-amino acid substitutions to understand ligand-receptor docking parameters.
Preclinical research demonstrates that GHRP-2 acts as a potent synthetic agonist at the GHS-R1a receptor, a 7-transmembrane G-protein coupled receptor (GPCR) predominantly expressed in the anterior pituitary gland and hypothalamus. Unlike native Growth Hormone-Releasing Hormone (GHRH), which activates the adenylate cyclase/cAMP signaling pathway, GHRP-2 triggers signaling through the phospholipase C (PLC) cascade.
Upon ligand binding, GHS-R1a activation stimulates PLC, leading to the hydrolysis of phosphatidylinositol 4,5-bisphosphate (PIP2) into inositol 1,4,5-trisphosphate (IP3) and diacylglycerol (DAG). IP3 triggers the rapid efflux of intracellular calcium (Ca2+) from the endoplasmic reticulum into the cytoplasm of somatotropes. This transient intracellular calcium spike, combined with protein kinase C (PKC) activation by DAG, induces exocytosis of pre-stored growth hormone granules. In vitro experiments indicate that co-administration of GHRH and GHRP-2 produces a synergistic secretagogue effect due to their distinct, non-overlapping intracellular signaling mechanisms.
In secretagogue research, comparative studies evaluate distinct peptide profiles regarding receptor affinity, potency, and selectivity. GHRP-2 is frequently contrasted with GHRP-6, Ipamorelin, and CJC-1295 No DAC to determine differential activity across endocrine pathways.
While GHRP-6 exhibits potent ghrelin receptor binding, preclinical models show that GHRP-2 yields a higher amplitude of GH release per molar concentration. However, GHRP-2 activation of GHS-R1a can also induce modest, dose-dependent co-stimulation of adrenocorticotropic hormone (ACTH) and prolactin secretion in animal models, whereas selective compounds like Ipamorelin demonstrate minimal impact on non-somatotropic pituitary axes. Conversely, combining GHS-R1a agonists with GHRH analogs remains a primary model for studying dual-receptor amplification dynamics. Researchers can review our complete catalog of all research peptides to compare specifications across secretagogue classes.
Academic literature covering GHRP-2 spans several decades of preclinical inquiry, focusing on anterior pituitary responsiveness, metabolic rate modification, and nitrogen dynamics in animal models. In vivo rodent studies have demonstrated that intravenous or subcutaneous administration of GHRP-2 results in rapid, transient elevations of circulating GH levels, peaking within 15 to 30 minutes post-administration.
Additional rodent models suggest that GHRP-2 signaling extends beyond pituitary somatotropes. Because GHS-R1a receptors are expressed in hypothalamic centers regulating energy balance, GHRP-2 administration in animal models has been observed to stimulate food intake via neuropeptide Y (NPY) and agouti-related peptide (AgRP) pathways. Furthermore, translational research in livestock and rodent models indicates that chronic administration of GHS-R1a agonists supports positive nitrogen balance and increases insulin-like growth factor 1 (IGF-1) transcript expression in hepatic tissues.
To ensure experimental reproducibility, researchers purchasing GHRP-2 online must demand comprehensive quality verification. PX1 Research adheres to rigorous quality assurance protocols to guarantee that every vial delivered to your laboratory meets strict research specifications. Our quality verification process includes:
1. Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC): Establishes chemical purity, ensuring that target peptide content exceeds 98.0% and that minor synthesis deletion sequences are quantified and controlled. 2. Electrospray Ionization Mass Spectrometry (ESI-MS): Verifies exact molecular weight (818.0 Da) and confirms the absence of incorrect amino acid sequences or heavy metal adducts. 3. Endotoxin Testing (LAL Assay): Measures bacterial endotoxin levels to ensure values remain well below regulatory limits (<0.05 EU/mg), preventing artifactual inflammatory responses in primary cell cultures. 4. Analytical Traceability: Every lot is assigned a unique identifier linked directly to its downloadable Certificate of Analysis on our PX1 Research library hub.
Proper handling and storage of lyophilized peptides are vital to maintaining peptide stability and preventing enzymatic degradation. GHRP-2 is supplied as a lyophilized white powder under vacuum or inert gas flushing. To preserve structural integrity prior to reconstitution, un-opened vials should be stored at -20°C or -80°C in a desiccated environment.
For laboratory reconstitution, researchers should allow the vial to equilibrate to room temperature before adding a suitable solvent, such as sterile bacteriostatic water (containing 0.9% benzyl alcohol) or laboratory-grade phosphate-buffered saline (PBS, pH 7.4). Solvents should be injected gently against the inner glass wall of the vial, followed by gentle swirling—never vigorous vortexing—to reconstitute the peptide without shearing secondary structures. Reconstituted solutions should be aliquoted into single-use polypropylene tubes to avoid repeated freeze-thaw cycles and stored at -20°C for short-term assays or -80°C for long-term storage.
PX1 Research supports university laboratories, contract research organizations (CROs), and biotechnology firms with flexible procurement arrangements. Whether your institution requires single vials for preliminary assays or bulk quantities for extended longitudinal studies, our facility offers lot matching and custom packaging tailored to your research workflow.
Institutional buyers seeking volume pricing, custom synthesis specifications, or recurring order schedules can set up dedicated accounts through our bulk lab account options. All shipments originate from our domestic United States warehouses in California and Arizona, ensuring fast dispatch, secure temperature-controlled packaging, and full compliance with laboratory chemical transport protocols.
What is GHRP-2 and what is its primary research application?
GHRP-2 (Growth Hormone Releasing Peptide-2) is a synthetic hexapeptide agonist of the growth hormone secretagogue receptor (GHS-R1a). It is primarily studied in preclinical and in vitro research focused on anterior pituitary signaling, growth hormone secretion kinetics, and ghrelin receptor dynamics.
What purity level can I expect when sourcing GHRP-2 from PX1 Research?
Every lot of GHRP-2 supplied by PX1 Research is verified via RP-HPLC to feature a minimum chemical purity of 98.0%. Full documentation, including mass spectrometry data, is available on the lot-specific Certificate of Analysis.
Is GHRP-2 approved for human consumption or therapeutic use?
No. GHRP-2 is strictly a research compound intended exclusively for laboratory, in vitro, and preclinical animal research. It is not approved for human consumption, medical diagnosis, treatment, or therapeutic use.
How does GHRP-2 differ mechanically from GHRP-6?
GHRP-2 and GHRP-6 are both hexapeptide GHS-R1a agonists; however, preclinical data indicate that GHRP-2 exhibits higher potency for GH release per molar concentration. GHRP-6 typically demonstrates a stronger appetite-stimulating effect via hypothalamic NPY activation in animal models.
What solvents are recommended for reconstituting lyophilized GHRP-2?
For standard laboratory assays, lyophilized GHRP-2 is typically reconstituted using sterile bacteriostatic water or sterile phosphate-buffered saline (PBS, pH 7.4). The choice of solvent depends on the specific requirements of the downstream assay.
How should reconstituted GHRP-2 be stored to maintain stability?
Once reconstituted, GHRP-2 solutions should be aliquoted into single-use microcentrifuge tubes to prevent repeated freeze-thaw degradation. Aliquots should be stored at -20°C for short-term research or -80°C for extended preservation.
What are the endotoxin limits for PX1 Research peptides?
PX1 Research conducts Limulus Amebocyte Lysate (LAL) endotoxin testing on all peptide lots, ensuring endotoxin levels remain below strictly controlled laboratory thresholds (<0.05 EU/mg) to prevent cellular toxicity or confounding inflammatory responses.
Where are PX1 Research compounds manufactured and shipped from?
All PX1 Research compounds are manufactured in domestic, GMP-compliant facilities and shipped directly from our primary distribution centers located in California and Arizona, USA.
All products are sold strictly for laboratory and research use only. Not for human or veterinary use, diagnosis, treatment or consumption. Statements have not been evaluated by the FDA.