Acetyl tetrapeptide-5
is used in cosmetic eye formulations to decrease puffiness, eye bags, and dark circles by reducing edema and protecting proteins such as SOD from glycation
Alanine
Ala / A · hydrophobic residue · neutral charge
AOD-9604
is studied as an anti-obesity peptide that can reduce weight gain and increase fat oxidation in obese animal models with generally neutral effects on IGF-1 and glucose metabolism in early human trials
Arginine
Arg / R · basic residue · positive charge
Argireline
is a topical cosmetic peptide reported to decrease dynamic wrinkles by partially mimicking the mechanism of botulinum toxin in a non-invasive manner
Asparagine
Asn / N · polar residue · neutral charge
Aspartic acid
Asp / D · acidic residue · negative charge
BPC-157
is investigated for accelerating healing of gastrointestinal mucosa, tendons, ligaments, bone, and nervous tissue in preclinical models, with anti-inflammatory and pro-angiogenic effects
Comparison
While Melanotan II is studied as a tanning and libido-enhancing agent; increases melanin production and can reduce food intake and modulate sexual arousal in animal models and humans3545, SS-31 improves mitochondrial bioenergetics, reduces oxidative stress, and shows protective effects in models of ischemia-reperfusion, neurodegeneration, and other mitochondrial disorders4637137.
While Melanotan II works as a cyclic heptapeptide melanocortin analog (Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-NH2) that acts as a non-selective, high-potency agonist at MC1R, MC3R, MC4R, and MC5R, influencing pigmentation, appetite, and sexual behavior3545, SS-31 is a mitochondria-targeted tetrapeptide, d-Arg-dimethylTyr-Lys-Phe-NH2, that selectively binds cardiolipin in the inner mitochondrial membrane, stabilizing cristae structure, improving electron transport, and reducing ROS production4637137143.
Melanotan II
POMC
SS-31
Not assigned in the current dataset.
Melanotan II and SS-31 are noticeably different, with limited direct overlap in their usual biological context. Their typical research and application settings separate fairly clearly: Melanotan II is more often discussed in the realm of Dermatology and aesthetics and Reproductive health, whereas SS-31 is more often associated with the realm of Aging and longevity and Cardiovascular health. They also influence different molecular systems, with Melanotan II tracking more closely to Melanocortin receptor while SS-31 centers more on Mitochondrial membrane. Melanotan II has a more synthetic analog origin, while SS-31 is closer to synthetic design background with Melanotan II approved for Research use only and SS-31 in Clinical phase 2. Melanotan II takes the form of a cyclic peptide, whereas SS-31 is closer to a linear peptide, Melanotan II carries acetylation features, while SS-31 instead reflects d-amino acid substitution and amidation changes; while their sequence patterns also diverge, with Melanotan II showing protein-mimetic sequence features and SS-31 showing cationic amphipathic features.
No related articles are linked to these peptides yet.