Figure 3.

Cyanobactins that encode heterocyclization enzymes. The peptides are organized in chronological order and the sequence of the core peptide is presented in the linear form. The location of the prenyl-group is indicated by one letter amino acid abbreviation in the correspondent column. The genes are identified by different colors. Heterocyclization of Cys (pale yellow) or Ser/Thr (pale blue), oxidation to azole (red dashed line), prenylation (pale red) and N-methylation (pale green) are indicated in the chemical structures.