What is MT2? A Researcher's Guide to Melanotan 2 Peptide
What is MT2? A Researcher's Guide to Melanotan 2 Peptide — MT2 (Melanotan II) is a synthetic cyclic heptapeptide analogue of alpha-melanocyte-stimulating hormone (α-MSH), the endogenous ligand of the melanocortin receptor family. First synthesised at the University of Arizona in the 1980s as part of efforts to develop photopigmentation agents without UV exposure requirements, MT2 has since become one of the most widely referenced melanocortin receptor tools in preclinical research. This guide is intended exclusively for qualified researchers and scientists seeking structured background on MT2's biochemistry, receptor pharmacology, and known areas of scientific investigation.
For informational and research purposes only. MT2 is supplied by Precision Chain Peptides strictly for in-vitro and laboratory research use. Not for human or animal consumption, self-administration, or therapeutic use.
MT2 Structure and Biochemistry
Melanotan II is a cyclic heptapeptide with the sequence Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-NH₂. Key structural features that distinguish it from native α-MSH include:
- A cyclic lactam bridge between Asp⁵ and Lys¹⁰, conferring conformational rigidity and improved receptor selectivity
- A D-Phe⁷ substitution in place of L-Phe, enhancing metabolic stability and receptor binding affinity
- An N-terminal acetyl group and C-terminal amide, reducing proteolytic degradation relative to the linear native peptide
These modifications result in a compound with substantially higher receptor affinity and longer plasma half-life than endogenous α-MSH, making MT2 a valuable pharmacological tool in melanocortin receptor research.
Melanocortin Receptor Biology
MT2 acts as a non-selective agonist at the melanocortin receptor family, a group of five G-protein-coupled receptors (GPCRs) with distinct tissue distributions and physiological roles:
- MC1R — expressed on melanocytes; primary mediator of melanogenesis and pigmentation signalling
- MC2R — ACTH-specific receptor expressed in the adrenal cortex; MT2 does not bind MC2R
- MC3R — expressed in hypothalamus, gut, and immune cells; implicated in energy balance and anti-inflammatory signalling
- MC4R — widely expressed in the central nervous system; key mediator of energy homeostasis and appetite regulation
- MC5R — expressed in exocrine glands and peripheral tissues; implicated in exocrine secretion regulation
MT2 demonstrates high binding affinity for MC1R, MC3R, MC4R, and MC5R, making it one of the most pharmacologically broad melanocortin tools available in research grade form.
Areas of Scientific Investigation
Melanogenesis and Pigmentation Biology
At MC1R, MT2 activates adenylyl cyclase, elevating intracellular cAMP and triggering MITF-mediated upregulation of melanogenic enzymes including tyrosinase, TYRP1, and TYRP2. Preclinical cell and animal models have used MT2 to study the cAMP–PKA–MITF axis, UV-independent pigmentation responses, and interspecies variation in MC1R pharmacology.
Energy Homeostasis and MC4R Research
MC4R is one of the most studied GPCR targets in the context of energy balance. MT2's potent MC4R agonism has made it a standard tool in hypothalamic appetite and metabolic rate research. Studies have used MT2 to probe the role of the melanocortin system in leptin-mediated signalling, orexigenic–anorexigenic pathway balance, and rodent models of diet-induced metabolic dysregulation.
Neuroendocrine and Hypothalamic Signalling
MT2 has been used in preclinical models to study central melanocortin pathway dynamics, including hypothalamic POMC neuron activity, the interaction between the melanocortin and endocannabinoid systems, and downstream neuropeptide signalling. Its CNS penetrance has made it a useful comparator in receptor occupancy and signalling cascade studies.
Immune Modulation via MC3R
MC3R is expressed on immune cells and has been implicated in anti-inflammatory and immune-modulatory processes. Preclinical research has used α-MSH analogues including MT2 to investigate NF-κB pathway inhibition, pro-inflammatory cytokine modulation, and the role of melanocortin signalling in innate immune response models.
MT2 in UK Research Peptide Science
MT2 10mg is available from Precision Chain Peptides for qualified laboratory research in the United Kingdom. Each vial is manufactured to ≥99% purity, independently HPLC-verified, and supplied with a Certificate of Analysis. As with all peptides in the PCP range, MT2 is supplied strictly for in-vitro and preclinical research purposes and is not intended for human use.
Researchers seeking to investigate melanocortin receptor pharmacology, pigmentation biology, or MC4R-mediated energy pathways may find MT2 10mg a useful addition to their compound library alongside complementary peptides such as GHK-Cu 50mg and BPC-157 10mg.
Frequently Asked Questions
What is MT2 (Melanotan 2)?
MT2 (Melanotan II) is a synthetic cyclic α-MSH analogue that acts as a non-selective agonist at melanocortin receptors MC1R, MC3R, MC4R, and MC5R. It is used in preclinical research to study pigmentation biology, energy homeostasis, and melanocortin receptor pharmacology.
Is MT2 the same as Melanotan 2?
Yes. MT2 and Melanotan II refer to the same compound — a synthetic cyclic heptapeptide analogue of alpha-MSH developed for melanocortin receptor research.
What is MT2 used for in research?
In preclinical research contexts, MT2 is used to study melanocortin receptor binding, melanogenesis, MC4R-mediated energy regulation, hypothalamic signalling, and immune modulation via MC3R.
Can I buy MT2 in the UK?
MT2 10mg is available for qualified laboratory research from Precision Chain Peptides, dispatched from the UK with ≥99% purity and HPLC verification. It is not available for personal use, human consumption, or self-administration.
For research use only. Not for human consumption, therapeutic use, or veterinary use.
View the full product listing: Buy MT2 10mg UK | Melanotan 2 Research Peptide. Related research peptides: GHK-Cu 50mg, BPC-157 10mg, TB-500 10mg. View our full research peptide range.
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