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Tocopherol biosynthetic pathway. This figure represents the enzymatic reactions and intermediates that are involved in tocopherol synthesis. 1, HPPD. 2, Homogentisate phytyl transferase (HPT). 3, 2-Methyl-6-phytyl-1,4-benzoquinone (MPBQ) methyltransferase. 4, TC. 5, γ-Tocopherol methyltransferase (γ-TMT). HPP, p-Hydroxyphenylpyruvate; HGA, homogentisic acid; SAM, S-adenosyl l-Met.
