Fig. 6 in 21-Hydroxypregnane 21-O-malonylation, a crucial step in cardenolide biosynthesis, can be achieved by substrate-promiscuous BAHD-type phenolic glucoside malonyltransferases from Arabidopsis thaliana and homolog proteins from Digitalis lanata

Fig. 6. Docking of homology modeled malonyltransferases with 3-O-acetylketol (displayed in grey) showing the distances between the catalytic histidine (His), the hydroxy group to be malonylated (Sub) and the malonyl residue presented by the co-substrate (CoA). A AtPMaT1 B AtPMaT2 C DlMaT1.