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Pathway for branched-chain amino acid synthesis. AHAS, acetohydroxy acid synthase; AHAIR, acetohydroxy acid isomeroreductase; ALAAT, alanine aminotransferase; DHAD, dihydroxy acid dehydratase, GDH, glutamate dehydrogenase; Nar, nitrate reductase; Nir, nitrite reductase; ThPP, thiamine pyrophosphate.
