Alamethicin is a peptide antibiotic, produced by the fungus Trichoderma viride. It contains the non-proteinogenic amino acid 2-aminoisobutyric acid (Aib), which strongly induces helical peptide structures. The peptide sequence is:

Ac-Aib-Pro-Aib-Ala-Aib-Ala-Gln-Aib-Val-Aib-Gly-Leu-Aib-Pro-Val-Aib-Aib-Glu-Gln-Phl

(Ac = acetyl, Phl = phenylalaninol)

• Molecular Formula: C₉₂H₁₅₀N₂₂O₂₅
• CAS number: 27061-78-5
• Appearance: Off white solid
• UV spectrum maxima: 265, 257
• Melting point: 255°C-270°C
• Solubility information: DMSO, Methanol, Ethanol. Not soluble in water

In cell membranes, it forms voltage-dependent ion channels by aggregation of four to six molecules.

_{data copied from Fermentek Alamethicin product page}