Figure 2.

Induction of cryptic bacterial metabolites upon treatment with Trp and sinapic acid. A) HPLC-MS analysis of P. inhibens cultures grown in the presence of Trp, SA, or both. The m/z of new molecules are marked. Roseobacticide B and C are labelled. B) HPLC-MS analysis of P. inhibens cultures grown in the presence of isotopically labelled ring-2H5-L-Trp and SA. The insets show the mass shifts observed (in red) for each compound.