Angiotensin III antipeptide is a peptide antibiotic[1].
References
[1] Maeda M, et, al. Suppressive effects of peptide antibiotics against proliferation and cytokine production in mitogen-activated human peripheral-blood mononuclear cells. Arzneimittelforschung. 2011;61(12):734-41. DOI:10.1055/s-0031-1300595