Extended Data Fig. 5: Stereochemistry of Thr (a), N-Methy-Thr (b), Glu (c), Leu (d), allo-Thr (e) and Arg (f) residues in herbicolin A determined by Marfey’s method.

Shown are extracted ion chromatograms of amino acid-FDAA adducts detected by HPLC-Qtof-MS of hydrolyzed, FDAA-derivatized herbicolin A and the amino acid standards. (i) herbicolin A-L-FDAA; (ii) L-AA-L-FDAA; (iii) D-AA-L-FDAA. FDAA, 1-fluoro-2-4-dinitrophenyl-5-L-alanine amide.