both the marmesin synthase and the psoralen synthase , as well as enzymes catalyzing the formation of demethylsuberosin and o-prenylumbelliferone from umbelliferone and dimethylallyl diphosphate , were associated with the endoplasmic reticulum in ammi majus cells and their activities were concomitantly induced by elicitor treatment of the cells .
C0014239
endoplasmic reticulum
C0007634
cells