2.3.1.172 malonyl-CoA + pelargonidin 3-O-(6-caffeoyl-beta-D-glucoside) 5-O-beta-D-glucoside = CoA + 4'''-demalonylsalvianin reaction mechanism, kinetic mechanism 654691 2.3.1.172 malonyl-CoA + pelargonidin 3-O-(6-caffeoyl-beta-D-glucoside) 5-O-beta-D-glucoside = CoA + 4'''-demalonylsalvianin specific for the penultimate step in salvianin biosynthesis, the enzyme also catalyses the malonylation of shisonin to malonylshisonin [cyanidin 3-O-(6''-O-p-coumaryl-beta-D-glucoside)-5-(6'''-O-malonyl-beta-D-glucoside)], the compounds 4'''-demalonylsalvianin, salvianin, pelargonidin 3,5-diglucoside and delphinidin 3,5-diglucoside cannot act as substrates 656032