Melanotan II Made in USA — Third-Party Verified
PX1 Research supplies USA-synthesized Melanotan II engineered specifically for in vitro and preclinical research applications. Every lot undergoes rigorous third-party verification in ISO 17025 accredited laboratories to ensure uncompromised chemical purity, lot-to-lot consistency, and strict compliance with analytical research standards.
Quick answer
PX1 Research supplies USA-synthesized Melanotan II engineered specifically for in vitro and preclinical research applications. Every lot undergoes rigorous third-party verification in ISO 17025 accredited laboratories to ensure uncompromised chemical purity, lot-to-lot consistency, and strict compliance with analytical research standards.
Key takeaways
- [Melanotan](/research-peptides/melanotan-2) II (MT-II) is a synthetic cyclic heptapeptide analog of endogenous alpha-melanocyte-stimulating hormone (α-MSH).
- Sourcing [melanotan ii made in usa](/product/melanotan-2) guarantees strict oversight across every phase of peptide synthesis.
- The molecular architecture of [Melanotan](/research-peptides/melanotan-2) II incorporates a lactam bridge between the Asp2 and Lys7 residues, conferring structural rigidity compared to linear endogenous peptide sequences.
- Preclinical investigations utilizing rodent models and cultured human melanocyte cell lines have established MT-II as a primary tool for evaluating melanogenesis.
Overview of Synthetic Melanocortin Receptor Agonists
Melanotan II (MT-II) is a synthetic cyclic heptapeptide analog of endogenous alpha-melanocyte-stimulating hormone (α-MSH). Chemically designated as Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-NH2, MT-II was originally designed to investigate the structural requirements of melanocortin receptor activation and downstream physiological signalling.
In preclinical laboratory settings, scientists utilize high-purity peptides like Melanotan II to study GPCR (G-protein coupled receptor) interactions, signal transduction cascades involving cyclic adenosine monophosphate (cAMP), and cellular mechanisms regulating pigmentation responses. As a potent, non-selective agonist across multiple melanocortin receptor subtypes, MT-II serves as a foundational reference compound in bio-analytical laboratories globally.
Domestic Synthesis and Quality Control Standards
Sourcing melanotan ii made in usa guarantees strict oversight across every phase of peptide synthesis. Overseas manufacturing frequently relies on unverified solid-phase peptide synthesis (SPPS) conditions, resulting in truncated sequences, residual organic solvents, trifluoroacetic acid (TFA) salts, or heavy metal contamination that compromises in vitro assay fidelity.
PX1 Research utilizes cGMP-compliant domestic facilities operating under automated SPPS workflows to yield pristine peptide sequences. By maintaining complete domestic production, our supply chain eliminates the risks associated with international transit delays, improper temperature regulation during import, and untraceable third-party repackaging. Research teams relying on our USA-synthesized research peptides receive material produced under tightly monitored environmental controls.
Structural Chemistry and Receptor Affinity Profile
The molecular architecture of Melanotan II incorporates a lactam bridge between the Asp2 and Lys7 residues, conferring structural rigidity compared to linear endogenous peptide sequences. This conformational restriction enhances metabolic stability against enzymatic degradation by aminopeptidases, making MT-II a resilient tool for long-duration laboratory assays.
Pharmacological assays demonstrate that Melanotan II exhibits high binding affinity across several melanocortin receptor subtypes, including MC1R, MC3R, MC4R, and MC5R. In vitro binding studies indicate that interaction with the MC1R subtype located on melanocytes initiates adenylate cyclase activation, elevating intracellular cAMP levels. This downstream pathway upregulates tyrosinase activity—the rate-limiting enzyme in melanin biosyntheses—making MT-II a vital probe for investigating skin pigmentation pathways.
Preclinical Applications in Pigmentation and Receptor Research
Preclinical investigations utilizing rodent models and cultured human melanocyte cell lines have established MT-II as a primary tool for evaluating melanogenesis. In vitro data indicate that exposure to melanocortin agonists stimulates the expression of microphthalmia-associated transcription factor (MITF), subsequently driving eumelanin production.
Additionally, research teams utilize MT-II to explore broader neurochemical and metabolic signaling pathways mediated by central MC3R and MC4R activation. Because Melanotan II crosses the blood-brain barrier in animal models, researchers utilize the compound to study central nervous system regulation of energy homeostasis, sexual behavior pathways, and neuroinflammatory responses. Comprehensive documentation of these signaling pathways can be explored within our peptide research library.
Comparative Analysis: Melanotan II vs. Related Melanocortin Compounds
When designing experimental protocols, researchers frequently compare Melanotan II against other synthetic melanocortin analogs to evaluate receptor selectivity and biological half-life. While MT-II is a cyclic, non-selective agonist, Melanotan I (Afamelanotide) is a linear peptide sequence designed with greater relative selectivity for MC1R over central melanocortin receptors.
Conversely, compounds such as Bremelanotide PT-141—a metabolite derivative of MT-II lacking the C-terminal amide structure—are primarily investigated for central MC3R and MC4R pathways rather than cutaneous melanogenesis. Understanding these structural and functional divergences allows investigators to select the precise melanocortin receptor agonists necessary for their specific cell-culture or animal research models.
Analytical Verification: ISO 17025 HPLC, MS, and Endotoxin Testing
Quantitative accuracy in biological research requires absolute reagent purity. Every lot of Melanotan II distributed by PX1 Research undergoes rigorous testing at an independent ISO 17025 accredited analytical facility. Purity is characterized via High-Performance Liquid Chromatography (HPLC) coupled with Mass Spectrometry (MS) sequence verification.
Our analytical standards ensure that each batch exceeds 99% peptide purity by peak area analysis, with exact mass confirmed via electrospray ionization mass spectrometry (ESI-MS). Furthermore, to prevent cellular toxicity or inflammatory artifacts in biological assays, PX1 Research subjects all batches to Chromogenic Recombinant Factor C (rFC) testing, supplying strictly verified endotoxin-tested research reagents. Analytical Certificate of Analysis (COA) documents are fully accessible per individual batch.
Reconstitution Guidelines and Laboratory Handling Protocols
Melanotan II is supplied as a lyophilized powder under inert argon gas atmosphere to maintain long-term peptide stability. For laboratory reconstitution, researchers should utilize sterile Bacteriostatic Water or sterile 0.9% Sodium Chloride injection solution depending on experimental requirements.
Proper laboratory handling involves allowing the vial to equilibrate to room temperature before reconstitution to prevent moisture condensation. Diluent should be introduced gently along the glass wall of the vial, followed by gentle swirling without aggressive agitation to preserve the tertiary peptide structure. Detailed laboratory protocols regarding reconstitution volumes and aliquot storage can be reviewed in our comprehensive peptide storage guidelines.
Storage Conditions and Solution Stability in Vitro
Lyophilized Melanotan II should be stored at -20°C for long-term stability, protected from light exposure. Under these conditions, the unconstituted peptide maintains chemical integrity for up to 24 months. Exposure to ambient temperatures during transit is mitigated by our optimized lyophilization cake matrix and rapid domestic fulfillment.
Once reconstituted into aqueous solution, MT-II aliquots should be stored at 2°C to 8°C for short-term experimental protocols (up to 30 days) or stored at -80°C for extended use. Repeated freeze-thaw cycles must be strictly avoided to prevent physical denaturation or cleavage of the peptide backbone during downstream analytical assays.
PX1 Research Advantage: Supply Chain Integrity and Compliance
PX1 Research is dedicated exclusively to supporting academic, biotechnology, and institutional research facilities. By maintaining direct control over our domestic synthesis, laboratory testing, and climate-controlled fulfillment, we guarantee uncompromised reagent reliability for every client.
Orders placed Monday through Friday ship same-day directly from our state-of-the-art facilities located in California and Arizona. Every order includes lot-specific HPLC and MS analytical reports, ensuring your research team receives fully documented, domestically produced compounds verified via our rigorous HPLC and Mass Spectrometry analysis.
Frequently Asked Questions
What is the purity specification for PX1 Research Melanotan II?
PX1 Research guarantees a minimum of 99% purity for Melanotan II as determined by High-Performance Liquid Chromatography (HPLC) and confirmed by Mass Spectrometry (MS) at an independent ISO 17025 accredited laboratory.
Is Melanotan II synthesized in the United States?
Yes. All Melanotan II offered by PX1 Research is 100% synthesized, lyophilized, and packaged within cGMP-compliant facilities located in the USA.
Can PX1 Research Melanotan II be used for human consumption or tanning?
No. Melanotan II is sold strictly as a research compound for laboratory research use only. It is not intended for human or animal administration, medical treatment, diagnostic procedures, or cosmetic use.
What testing is conducted to verify sequence and low endotoxin levels?
Each lot undergoes Electrospray Ionization Mass Spectrometry (ESI-MS) to confirm sequence identity and exact molecular weight. Bacterial endotoxin testing is conducted using recombinant Factor C assays to ensure levels remain below strictly controlled research thresholds.
How should lyophilized Melanotan II be stored upon arrival at the laboratory?
Lyophilized vials should be stored at -20°C in a desiccated environment protected from light. Under proper freezing conditions, the peptide remains stable for up to 24 months.
What diluent should be used to reconstitute Melanotan II for in vitro assays?
Reconstitution is typically performed using sterile Bacteriostatic Water or sterile physiological saline (0.9% NaCl), depending on the requirements of your specific cell-culture or bio-analytical assay.
How does Melanotan II differ structurally from Melanotan I?
Melanotan II is a cyclic heptapeptide analog (Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-NH2), whereas Melanotan I (Afamelanotide) is a linear tridecapeptide. The cyclic structure of MT-II confers increased enzymatic resistance and broader receptor binding across MC1R, MC3R, MC4R, and MC5R.
What fulfillment and shipping options are available for domestic orders?
PX1 Research provides same-day dispatch for orders placed before cutoff times Monday through Friday, shipping directly from our distribution hubs in California and Arizona via expedited domestic carriers.
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.