High-purity Melanotan II is a synthetic cyclic heptapeptide melanocortin receptor agonist evaluated in preclinical literature for its activity across MC1R, MC3R, MC4R, and MC5R signaling pathways. For laboratory researchers seeking to comprare Melanotan 2 for analytical or in vitro investigation, securing reference-grade material verified by lot-specific analytical testing is essential for experimental accuracy and reproducibility.
High-purity Melanotan II is a synthetic cyclic heptapeptide melanocortin receptor agonist evaluated in preclinical literature for its activity across MC1R, MC3R, MC4R, and MC5R signaling pathways. For laboratory researchers seeking to comprare Melanotan 2 for analytical or in vitro investigation, securing reference-grade material verified by lot-specific analytical testing is essential for experimental accuracy and reproducibility.
Investigators inquiring how or where to comprare Melanotan 2 for scientific research must prioritize verified chemical purity, strict quality control, and comprehensive analytical documentation. Melanotan II (MT-2) is a synthetic analog of alpha-melanocyte-stimulating hormone (α-MSH) designed strictly for laboratory research use, in vitro assays, and preclinical animal models. Obtaining reproducible experimental outcomes requires sourcing reference-standard material produced in GMP-compliant facilities.
When purchasing compounds for laboratory evaluation, researchers should avoid unverified vendors and demand lot-specific Certificates of Analysis (COAs) generated by independent ISO 17025 accredited laboratories. PX1 Research provides high-purity Melanotan 2 manufactured in the United States, complete with reverse-phase high-performance liquid chromatography (RP-HPLC) and electrospray ionization mass spectrometry (ESI-MS) verification. Explore our full catalog of all peptides for compliant analytical applications.
Melanotan II is a synthetic, cyclic lactam analog of the naturally occurring peptide hormone alpha-melanocyte-stimulating hormone (α-MSH). Chemically designated as Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-NH2, Melanotan II possesses a molecular weight of approximately 1024.2 g/mol. The inclusion of a D-phenylalanine residue at position 7 alongside side-chain-to-side-chain cyclization between aspartic acid and lysine residues grants the molecule significantly enhanced metabolic stability against enzymatic degradation compared to native endogenous α-MSH.
In laboratory settings, these structural modifications result in extended half-life during in vitro incubation assays and preclinical animal model studies. The hydrophobic core and rigid cyclic conformation alter its receptor binding kinetics, facilitating prolonged interaction with transmembrane G-protein coupled melanocortin receptors. Researchers studying the biophysical properties of peptide analogs frequently utilize MT-2 as a benchmark compound for investigating receptor-ligand interaction dynamics within the broader family of melanocortin agonists.
The primary mechanism of action of Melanotan II centers on its non-selective agonism across multiple melanocortin receptor subtypes, specifically MC1R, MC3R, MC4R, and MC5R. Unlike endogenous α-MSH, which exhibits transient activation patterns, MT-2 demonstrates potent binding affinity and prolonged signaling capacity. Interaction with these G-protein coupled receptors stimulates intracellular adenylyl cyclase activity, elevating cyclic adenosine monophosphate (cAMP) levels and downstream protein kinase A (PKA) signaling cascades.
Preclinical studies suggest that binding at the melanocortin 1 receptor (MC1R) located on epidermal melanocytes directly stimulates tyrosinase enzymatic activity. Tyrosinase serves as the rate-limiting enzyme in melanogenesis, converting L-tyrosine to L-DOPA and subsequently into eumelanin polymers. In vitro assays demonstrate that MT-2 upregulation of cAMP via MC1R triggers transcription factor MITF (microphthalmia-associated transcription factor), leading to increased synthesis of protective dark pigments in cell culture models.
Academic literature surrounding Melanotan II extensively documents its role in melanogenesis and cutaneous photoprotection models. In animal models and organotypic skin culture systems, administration of MT-2 has been observed to induce follicle and epidermal pigmentation independently of ultraviolet (UV) radiation exposure. These observations have allowed basic science researchers to decouple physiological pigment synthesis from UV-induced DNA damage signaling pathways.
In vitro data indicate that Melanotan II drives the shift from pheomelanin (red/yellow sulfur-containing pigment) to eumelanin (black/brown photoprotective pigment) production within cultured melanocytes. Investigators examining DNA repair mechanisms, reactive oxygen species (ROS) quenching, and photoprotective cellular responses frequently utilize MT-2 to establish controlled melanogenic baselines. Further details on comparative signal transduction profiles can be found in our research library hub.
When planning to comprare Melanotan 2 for analytical protocols, laboratory managers must rigorously evaluate supplier verification standards. Substandard peptide reagents containing synthesis side-products, truncated sequences, or residual TFA (trifluoroacetic acid) can compromise cell viability, skew receptor binding curves, and render experimental results uninterpretable. A dependable research supplier must publish lot-specific analytical testing performed by independent third-party laboratories.
At PX1 Research, every batch of peptide undergo stringent quality control using dual analytical methodologies. Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) establishes chromatographic purity, verifying that the primary compound accounts for ≥99% of total integrated peak area. Simultaneously, Mass Spectrometry (MS) confirms exact molecular mass and sequence integrity, ensuring zero cross-contamination or chemical degradation before distribution from our CA and AZ facilities.
Bacterial endotoxins—lipopolysaccharides (LPS) derived from Gram-negative bacterial outer membranes—pose a critical challenge in cell culture and preclinical research. Presence of endotoxins in reconstituted peptide solutions can trigger non-specific inflammatory responses via Toll-like receptor 4 (TLR4) activation, masking true experimental variables in melanocortin signaling studies.
PX1 Research implements strict Limulus Amebocyte Lysate (LAL) testing protocols for all synthesized compounds to guarantee endotoxin levels remain far below established research thresholds (<0.01 EU/μg). Synthetic execution takes place in state-of-the-art, GMP-compliant facilities adhering to ISO 17025 laboratory guidelines. Procurement departments seeking bulk quantities for institutional projects can learn more about specialized handling via our wholesale lab account portal.
To contextualize Melanotan II within melanocortin receptor research, investigators frequently compare its receptor binding profile against structural analogs such as Melanotan I and Bremelanotide. While all three compounds share structural homology derived from the core α-MSH sequence, distinct chemical modifications yield contrasting receptor selectivities and biological stability profiles in laboratory evaluations.
For instance, Melanotan 1 (Afamelanotide) is a linear peptide analog (Ac-Ser-Tyr-Ser-Met-Glu-His-D-Phe-Arg-Trp-Gly-Lys-Pro-Val-NH2) exhibiting high selectivity for the MC1R receptor, making it a primary reference standard for isolated cutaneous pigmentation studies. In contrast, PT-141 (Bremelanotide) is a cyclic metabolite of MT-2 featuring a hydroxylated terminal structure that shifts its primary activity toward central nervous system MC3R and MC4R pathways while exhibiting reduced MC1R potency. Melanotan II maintains robust, non-selective potency across MC1R, MC3R, MC4R, and MC5R, offering a broad-spectrum tool for multi-receptor activation studies.
Proper reconstitution technique is imperative to preserve the tertiary structure and bioactivity of lyophilized Melanotan II peptides. Lyophilized MT-2 cake should be allowed to equilibrate to room temperature inside a laminar flow hood before reconstitution to prevent condensation of atmospheric moisture within the vial.
For laboratory procedures, reconstitution is typically performed using sterile Bacteriostatic Water (0.9% benzyl alcohol) or sterile normal saline (0.9% NaCl), depending on downstream assay compatibility. The solvent should be introduced gently along the glass wall of the vial rather than sprayed directly onto the peptide powder. Gentle swirl motion—never vigorous vortexing or agitating—should be applied until complete dissolution is achieved. Reconstituted stock solutions should be aliquoted into single-use polypropylene tubes to minimize freeze-thaw cycles.
Lyophilized Melanotan II exhibits excellent long-term chemical stability when stored under appropriate climate-controlled conditions. Unopened vials containing desiccated peptide powder should be stored at -20°C for short-to-medium term storage, or at -80°C for multi-year preservation. Exposure to direct light, elevated thermal conditions, and moisture must be rigorously avoided to prevent peptide bond hydrolysis and methionine oxidation.
Once reconstituted into aqueous liquid media, MT-2 stock solutions maintain chemical integrity at 2°C to 8°C for short experimental durations (typically up to 30 days when prepared with bacteriostatic agents). For extended experimental timelines, aliquoted liquid samples should be stored at -20°C or lower. Researchers should monitor solutions for signs of aggregation, precipitation, or discoloration prior to introducing reagents into bioassays.
PX1 Research serves as a premier USA-based supplier of reference-grade research peptides tailored to the rigorous demands of university laboratories, contract research organizations (CROs), and private biotechnology enterprises. When institutional researchers choose to comprare Melanotan 2 through PX1, they receive fully traceable, domestic production supported by unmatched quality verification.
Orders placed Monday through Friday ship same-day from our dual fulfillment nodes located in California and Arizona, ensuring rapid transit times and minimal exposure to environmental fluctuations during transport. Every product shipment includes direct access to verifiable RP-HPLC spectra, mass spectrometry reports, and endotoxin analysis certificates matching the specific batch lot number received.
What is Melanotan 2 studied for in scientific literature?
Melanotan II is studied in preclinical literature for its agonist activity at melanocortin receptors (MC1R, MC3R, MC4R, MC5R). Research focuses primarily on its stimulation of melanogenesis (skin pigmentation pathways), cellular photoprotection, cyclic AMP intracellular signaling, and central nervous system receptor interactions.
Why is third-party HPLC and MS testing necessary before buying Melanotan 2?
Third-party RP-HPLC confirms chromatographic purity (ensuring ≥99% primary compound), while Mass Spectrometry (MS) verifies correct molecular weight and structural identity. This independent testing guarantees that research reagents are free of sequence truncations, residual solvents, or synthesis contaminants that could distort experimental results.
What are the recommended storage conditions for lyophilized Melanotan 2?
Lyophilized Melanotan II powder should be stored sealed with a desiccant at -20°C for medium-term storage or -80°C for long-term preservation. Protecting the compound from moisture, heat, and direct light exposure prevents chemical degradation and oxidation.
How should Melanotan 2 be reconstituted for laboratory assays?
Melanotan II is reconstituted under sterile laminar flow by adding an appropriate laboratory solvent, such as sterile bacteriostatic water or normal saline, down the side of the vial wall. Gentle manual rotation should be used to dissolve the peptide without aggressive agitation or vortexing.
What is the endotoxin limit for PX1 Research peptides?
PX1 Research peptides undergo strict Limulus Amebocyte Lysate (LAL) endotoxin testing to ensure levels remain below 0.01 EU/μg. Low endotoxin levels prevent non-specific immune signaling or TLR4 receptor activation during in vitro cell culture and preclinical studies.
How does Melanotan II differ structurally from native alpha-MSH?
Melanotan II is a truncated, cyclic heptapeptide analog of native linear alpha-MSH. It incorporates a D-phenylalanine substitution at position 7 and side-chain cyclization, granting significantly higher metabolic stability, resistance to enzymatic cleavage, and extended receptor binding kinetics.
Where are PX1 Research compounds synthesized and shipped from?
PX1 Research peptides are manufactured in state-of-the-art, GMP-compliant facilities within the United States. Orders are dispatched directly from fulfillment centers in California and Arizona with same-day shipping for orders placed Monday through Friday.
Is Melanotan 2 approved for human consumption or administration?
No. Melanotan II supplied by PX1 Research is strictly designated for laboratory research use, in vitro experiments, and preclinical animal studies. It is not intended for human or veterinary consumption, medical treatment, diagnosis, or therapeutic application.
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.