Extended Data Figure 7: Matrix-assisted laser desorption ionization (MALDI) mass-spectrometry detection of adenylation-domain substrate activation by ATP–pyrophosphate exchange assay.
From: An environmental bacterial taxon with a large and distinct metabolic repertoire

a, Assay of CthA2 with the 20 proteinogenic amino acids and l-2,3-diaminopropionic acid. b, Assay of KerA5 with the 20 proteinogenic amino acids (n = 3; error bars, s.d.).