The arogenate dehydratase gene family: Towards understanding differential regulation of carbon flux through phenylalanine into primary versus secondary metabolic pathways

► Twenty-five Arabidopsis thaliana arogenate dehydratase mutants were analyzed for amino acid pool sizes. ► Those mutants, which had ADT directed to Phe conversion into stem lignin, had much reduced Phe levels. ► No other significant effects on amino acid pool sizes were observed.