Extended Data Fig. 8: IsoAnalyst profiles of desferrioxamines and their fragments.
From: An isotopic labeling approach linking natural products with biosynthetic gene clusters

(a) Structures with observed fragmentation indicated and mass spectra for [M + H]+ ions of 8 and 14. Expected (Exp.) and observed (Obs.) labeling for 8 and 14 in each condition is indicated in boxes. (b) Mass spectra of observed b-ion and y-ion fragments for 8 and 14. Expected and observed labeling for fragments indicated in boxes.