STEP 1
Sterile Lyophilization
Compounds are produced under documented quality procedures, then freeze-dried and nitrogen-sealed in sterile vials.
Research use only
Peptide Portal supplies research peptides exclusively to qualified researchers and laboratories for in vitro and laboratory use. Please confirm before continuing.
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CAS #: 121062-08-6
Peptide Portal supplies research peptides exclusively to qualified researchers and laboratories for in vitro and laboratory use. Products are not for human or veterinary use, not for use in diagnostic procedures, and have not been evaluated by the U.S. Food and Drug Administration.
Melanotan II is a synthetic cyclic heptapeptide analog of α-MSH, a naturally occurring peptide that regulates pigmentation through target receptor activation. Originally developed as a research compound for studying melanogenesis and photoprotective pathways, MT-II exhibits high affinity for its primary target receptor subtypes. Through selective binding to multiple pathway targets, it has been examined in research contexts involving pigmentation pathways, endocrine signaling, and peptide-receptor pharmacology in laboratory settings.
Dorr et al. (2004).
Melanotan II was synthesized in the 1990s at the University of Arizona as part of peptide signaling research aimed at developing photoprotective research compounds. Building upon earlier work with linear melanotropic peptides, researchers created this cyclized analog to improve stability and target selectivity. The peptide emerged from systematic structure-activity relationship studies examining peptide-receptor agonist dynamics.
Dorr et al. (1996).

STEP 1
Compounds are produced under documented quality procedures, then freeze-dried and nitrogen-sealed in sterile vials.
STEP 2
ISO 17025 accredited third-party labs verify every lot — purity by HPLC, identity by mass spectrometry.
STEP 3
Orders leave our U.S. fulfillment center the same day, with tracking and discreet packaging on every order.
Our team works around the clock, 24/7.
Each vial contains the labelled quantity of lyophilized peptide. The stated milligram figure refers to the peptide content, not the total mass of the lyophilized cake.
Reconstitution requires bacteriostatic water and appropriate laboratory equipment, which are not included.
Products ship as research materials without directions for use. Handling should follow your own laboratory protocols.
Store lyophilized material at 2-8°C and away from light. Once reconstituted, follow your laboratory's stability guidance.
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