1.3.1.43 arogenate dehydrogenase L-tyrosine biosynthesis III 2.6.1.78 aspartate-prephenate aminotransferase L-tyrosine biosynthesis III 2.6.1.79 glutamate-prephenate aminotransferase L-tyrosine biosynthesis III 5.4.99.5 chorismate mutase L-tyrosine biosynthesis III