FIGURE 10.

Different organizations of tyrosine metabolism in prokaryotes. ADH, arogenate dehydrogenase; ADT, arogenate dehydratase; AroAT, aromatic aminotransferase; E4P, erythrose 4-phosphate; PAT, prephenate aminotransferase; PDH, prephenate dehydrogenase; PEP, phosphoenolpyruvate; Tyr-AT, tyrosine aminotransferase; HPP, 4-hydroxyphenylpyruvate; HGA, homogentisate; 4-HPPD, 4-hydroxyphenylpyruvate dioxygenase; 1,2-HGAD, 1,2-homogentisate dioxygenase; Acetoacet., acetoacetate; Tocoph., tocopherols.