SEARCH Articles Figures Tables Alkaloids are basic compounds from amino acid metabolism Alkaloids as secondary metabolism molecules Ellipticine alkaloids metabolism Indole alkaloids metabolism Metabolic engineering tropane alkaloids Morphine alkaloids metabolism Nicotine alkaloids metabolism Papaver somniferum, alkaloid metabolism Pyrrolizidine alkaloid monocrotaline metabolic activation Pyrrolizidine alkaloids metabolic activation Secondary metabolisms alkaloids Used to Study Secondary Metabolism of Alkaloids