HUMAN DIHYDROOROTATE DEHYDROGENASE IN COMPLEX WITH A LEFLUNOMIDE DERIVATIVE INHIBITOR 1 3F1Q OXIDOREDUCTASE, DIHYDROOROTATE DEHYDROGENASE, LEFLUNOMIDE, FAD, FLAVOPROTEIN, MEMBRANE, MITOCHONDRION, MITOCHONDRION INNER MEMBRANE, POLYMORPHISM, PYRIMIDINE BIOSYNTHESIS, TRANSIT PEPTIDE