Description
Melanotan I Overview
Melanotan I is a synthetic tridecapeptide made up of 13 amino acids. It was derived from the naturally occurring hormone alpha-melanocyte-stimulating hormone (α-MSH) and modified at two positions so that it resists enzymatic breakdown.
Since its characterization in the early 1980s, Melanotan I has been studied extensively in controlled experimental settings for its potential influence on melanocyte activity, receptor signaling and pigmentary processes. Its linear structure makes a useful point of comparison with the cyclic Melanotan II.
Melanotan I Research Focus
Published laboratory and preclinical work on this peptide has concentrated on the following areas:
- Melanocyte activity
- Melanocortin receptor signaling
- Pigmentary processes
- Effect of enzymatic resistance on stability
Available Formats
Melanotan I is available in 10mg vials. Each strength can be ordered as a single vial or as a pack of 10 vials; choose your options above before adding to the cart.
Handling and Storage
Store and handle this product according to the product label and your laboratory’s standard operating procedures. For background on the factors that affect stability, such as temperature, moisture, light and repeated freeze-thaw cycles, read our guide to peptide storage and stability.
Where Melanotan I Fits in Our Range
Melanocortin peptides are analogs of α-melanocyte-stimulating hormone (α-MSH) studied for their activity at melanocortin receptors. This category includes the linear analog Melanotan I, the cyclic analog Melanotan II and PT-141 (Bremelanotide), studied at MC3R and MC4R.
Choosing a Format
The strength printed on a vial describes the total amount of material it contains, not a concentration. Work out how much material each planned experiment uses before ordering. The 10-vial pack suits a longer series of experiments, while a single vial suits a pilot run.
General Laboratory Handling
These are general principles for handling lyophilized peptides. The label and your own procedures take priority over them.
- Lyophilized peptides are generally far more stable than peptides in solution, so keep material dry until it is needed.
- Store sealed vials cold and away from light and moisture.
- Let a cold vial reach room temperature before opening it, so that condensation does not form on the powder.
- Divide reconstituted material into single-use aliquots to avoid repeated freeze-thaw cycles.
- Record the lot number, the date opened and the diluent used.
Checking Identity and Purity
Identity, purity and peptide content are separate questions. Mass spectrometry is typically used to confirm molecular mass, reversed-phase HPLC to assess purity, and amino acid analysis to measure peptide content. Our overview of analytical techniques in peptide research explains how these methods work and what each result can and cannot show.
Reference
Sawyer T.K. et al. (1980). Find this reference on PubMed.
Melanotan I FAQs
What is Melanotan I?
Melanotan I is a synthetic tridecapeptide made up of 13 amino acids.
What has this peptide been studied for?
Published work has concentrated on Melanocyte activity and melanocortin receptor signaling. See the research focus section above for the full list.
Which strengths are available?
10mg, each sold as a single vial or as a pack of 10 vials.
Can this product be used in people or animals?
No. It is sold only for laboratory research, and we cannot give dosing or human-use guidance.
Where can I ask a question about this product?
Use our contact page, or email support@directpeptiides.com. Include your order number if your question is about an order.
Related Research Peptides
- Melanotan II: Melanotan II (MT-II) is a synthetic cyclic heptapeptide analog of α-MSH.
- PT-141: PT-141, also known as Bremelanotide, is a synthetic peptide analog of α-MSH.
- KPV: KPV is a tripeptide derived from the C-terminus of α-MSH that keeps its signaling activity without melanotropic effects.
Browse the full Melanocortin Peptides range or search the shop.
For research use only. This product is intended exclusively for legitimate laboratory research. It is not for human or veterinary consumption and is not a drug, food, supplement or cosmetic. Nothing on this page is medical advice. By purchasing, the buyer agrees to use this product in compliance with all applicable laws.




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