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Peptide Therapy GuideClear peptide education

Understand the source comparison

Structural Comparison: MT-2 vs. Native α-MSH

Length 13 amino acids 7 amino acids Conformation Linear Cyclic (lactam bridge) Met at position 4 Yes (oxidation-susceptible) Replaced by Nle Phe stereochemistry L-Phe D-Phe (inverted) Terminal modifications None N-Ac / C-amide Metabolic stability Low High Rece

No winner is assigned.

This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.

  • Length
  • 13 amino acids
  • 7 amino acids
  • Conformation
  • Linear
  • Cyclic (lactam bridge)
  • Met at position 4
  • Yes (oxidation-susceptible)
  • Replaced by Nle
  • Phe stereochemistry
  • L-Phe
  • D-Phe (inverted)
  • Terminal modifications
  • None
  • N-Ac / C-amide
  • Metabolic stability
  • Low
  • High
  • Receptor selectivity
  • Primarily MC1R
  • MC1R, MC3R, MC4R, MC5R