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Met synthesis in higher plants. Key enzymes involved in Met synthesis through the Asp family and SMM pathways are presented. Main catabolic products of Met are presented in italics. Full arrows represent one metabolic step while dashed arrows represent several metabolic steps. OPH, O-Phosphohomoserine; SMM, S-methylmethionine; CGS, cystathionine-γ-synthase; HMT, homocysteine S-methyltransferase; MMT, SAM:Met S-methyltransferase.
