MT-2

### **MT-2 (Melanotan II) Research Peptide** **Product Overview and Molecular Mechanism** MT-2, also known as Melanotan II, is a synthetic cyclic heptapeptide analog of the endogenous α-melanocyte-stimulating hormone (α-MSH). In laboratory settings, MT-2 operates as a high-affinity non-selective agonist of the melanocortin receptors (MCRs), specifically targeting MC1, MC3, MC4, and MC5. Unlike the native α-MSH, MT-2 features a lactam bridge and incorporates D-phenylalanine at its central position, structural modifications that significantly enhance its metabolic stability and potency. Research indicates that its primary mechanism of action involves the activation of the MC1 receptor to stimulate melanogenesis and the MC4 receptor to modulate metabolic and neurobiological pathways. **Preclinical Research Applications** As a potent tool for *in vitro* and animal model studies, MT-2 is utilized to investigate various physiological systems. Researchers frequently employ the peptide to study the melanocortin system's role in energy homeostasis and appetite regulation through MC4R signaling. Furthermore, its ability to influence the barrier function of the skin and the pigmentary response of melanocytes makes it a staple in dermatological and photobiological modeling. Additionally, preclinical investigations have highlighted MT-2’s potential to modulate erectile function and libido in rodent models, providing a framework for understanding the neuroendocrine pathways associated with reproductive physiology. **Reconstitution, Handling, and Storage** MT-2 is supplied as a lyophilized white powder to ensure maximum stability. For laboratory use, it should be reconstituted using sterile Bacteriostatic Water or phosphate-buffered saline (PBS), depending on the specific requirements of the experimental protocol. To preserve the integrity of the peptide bonds, the vial should be swirled gently—never shaken. For long-term storage, the lyophilized powder should be kept at -20°C, protected from light. Once reconstituted, the solution should be stored at 2°C to 8°C and used within a short timeframe to prevent degradation. Multiple freeze-thaw cycles should be avoided to maintain the biological activity of the compound. *** **INTENDED FOR LABORATORY RESEARCH USE ONLY.** This product is not intended for human or animal consumption, nor for diagnostic or therapeutic use. All research must be conducted by qualified professionals in a controlled environment.