What is Melanotan II?
Melanotan II (CAS No. 121062-08-6) is a synthetically produced cyclic heptapeptide. Its chemical structure is a lactam-bridged analog of α-MSH with the sequence Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-NH2. For researchers studying melanocortin receptors, this cyclic design is highly significant because it offers greater stability and receptor binding affinity than native hormones. When laboratories search to melanotan II buy UK, they are sourcing a highly specific tool for studying receptor signaling, pigment synthesis pathways, and metabolic regulation in in-vitro systems.
Melanotan II acts as a non-selective agonist of melanocortin receptors, particularly the MC1, MC3, MC4, and MC5 subtypes. By studying this peptide, researchers can analyze the downstream cellular signaling pathways linked to melanin production and energy homeostasis.
Receptor Interactions and Research Applications
Melanotan II is primarily utilised in biochemical studies to map receptor-ligand interactions across the melanocortin system. The primary research models include:
1. Melanogenesis and MC1R Binding
The Melanocortin 1 Receptor (MC1R) is primarily found on melanocytes—the cells responsible for producing melanin pigment. In cell culture assays, researchers introduce Melanotan II to melanocyte lines to measure the activation rate of adenylate cyclase and the subsequent increase in intracellular cyclic adenosine monophosphate (cAMP). This research is central to understanding biological pigment synthesis and cellular protection mechanisms.
2. MC4R and Energy Homeostasis Models
The MC4 receptor is heavily involved in signaling pathways that regulate feeding behavior and metabolic rates. Through in-vitro receptor binding studies, researchers examine the molecular binding characteristics of Melanotan II at MC4R to better understand the structures of melanocortin receptors and find clues for structural biology modeling.
| Melanocortin Receptor | Primary Expression Site | In-Vitro Research Focus |
|---|---|---|
| MC1R | Melanocytes | cAMP pathway activation and pigment synthesis modeling |
| MC3R / MC4R | Central Nervous System / Hypothalamus | Receptor binding kinetics and metabolic modeling |
| MC5R | Exocrine Glands / Adipocytes | Sebaceous gland cell-line secretion kinetics |
Laboratory Handling, Reconstitution, and Storage Protocols
Because Melanotan II is a cyclic peptide, its structural rigidity makes it slightly more robust than some linear peptide chains. However, proper laboratory handling is still essential to prevent chemical breakdown:
- Lyophilised Form: Store the freeze-dried powder at -20°C. Ensure the container remains sealed and desiccated to prevent ambient humidity from degrading the cyclic bonds.
- Reconstitution Methods: Reconstitute with high-quality sterile Bacteriostatic Water or sterile lab water. Slowly inject the solvent down the inner wall of the glass vial to avoid physical stress on the molecules.
- Avoid Aggressive Agitation: Do not shake or vortex. Instead, gently swirl the vial until the white powder dissolves completely into a clear, colorless liquid.
- Aliquoting: Divide the solution into small, single-use aliquots. Store these aliquots at -20°C or lower. Avoid repeated freeze-thaw cycles, which will degrade the peptide's binding capacity.
Sourcing High-Purity Melanotan II in the UK
For scientific findings to hold weight, experimental consistency is absolute. When procuring Melanotan II in the United Kingdom, researchers must look beyond wholesale rates and verify the analytical purity of the compound. Impure peptide samples can contain truncated peptide chains or synthesis reagents that skew biological assay results. Ensure your supplier provides complete, verifiable High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS) documentation for every single batch.
By using only top-tier, HPLC-verified compounds and keeping all scientific testing strictly within in-vitro systems, UK laboratories can generate credible, reproducible data in their melanocortin research projects.