Involved in the biosynthesis of tyrosine. Has a weak prephenate dehydrogenase activity. L-arogenate + NADP(+) = CO2 + L-tyrosine + NADPH NADP increases the apparent affinity for arogenate. Amino-acid biosynthesis; L-tyrosine biosynthesis; L-tyrosine from L-arogenate (NADP(+) route): step 1/1. Expressed in roots, stems, leaves, flowers, siliques and seeds. More abundant in seeds. Strongly inhibited by tyrosine. Unlike TYRAAT1, TYRAAT2 is composed of a single catalytically active domain. Belongs to the prephenate/arogenate dehydrogenase family.