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. Author manuscript; available in PMC: 2017 Mar 1.
Published in final edited form as: Semin Immunopathol. 2015 Oct 21;38(2):139–152. doi: 10.1007/s00281-015-0534-0

Fig. 2. Amino acid metabolism in immune cells.

Fig. 2

A) L-arginine metabolism. B) L-tryptophan metabolism. Abbreviations: iNOS, inducible nitric oxide synthase; Arg, arginase; Ass1; argininosuccinate synthase; Asl, argininosuccinate lyase; IDO, indoleamine 2,3-dioxygenase; Afmid, kynurenine formamidase.