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PT-141s cyclic heptapeptide structure incorporating a D-Phe residue at position 4 and a cyclised structure via an Asp-Lys lactam bridge confers greater receptor binding stability and metabolic resistance than linear melanocortin peptides, while its chemical modification relative to -MSH shifts selectivity away from MC1R (peripheral pigmentation) toward central MC3R and MC4R, the receptors most relevant to sexual behaviour circuitry

Melanotan is a synthetic peptide that can stimulate the production of melanin in the skin, potentially leading to increased tanning

In wound botulism the spores are introduced into wounds where they germinate

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