Fig. 2 in Lichen-associated bacteria transform antibacterial usnic acid to products of lower antibiotic activity

Fig. 2. HPLC chromatograms of M. ruber cultures with or without UA. A) At the beginning of the stationary phase of bacterial growth; B) After 7 days of stationary phase. Compounds circled in red appear only in the culture with UA. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)