Fig. 13

Proposed biosynthetic pathway of ergot pigments. The xanthone units of the yellow ergochromes and the red anthraquinone pigments endocrocin and clavorubin are products from the same PKS derived precursors. The PKS gene was deleted in this study, assignment of roles for all other enzymes in bold were made based on comparison to similar characterized biosynthetic pathways [12, 13, 19]. Roles for enzymes in regular font are due to the predicted function of the corresponding gene (Table 1)