Fig. 1

Structures and precursor peptide sequences of ustiloxin-type ribosomally synthesized and post-translationally modified peptides (RiPPs). a Ustiloxin B from Aspergillus flavus, b asperipin-2a from A. flavus, and c phomopsin A from Phomopsis leptostromiformis. The core peptides, which become the RiPP backbone, are shown in bold; recognition sites for Kex2 protease in the precursor peptides are italicized. The signal peptides for translocation into the endoplasmic reticulum are underlined