The Hydroxy/Aromatic Amino Acid Permease (HAAAP) Family- tyrosine/tryptophan subfamily (TC 2.A.42.1) The HAAAP family includes well characterized aromatic amino acid:H+ symport permeases and hydroxy amino acid permeases. This subfamily is specific for aromatic amino acid transporters and includes the tyrosine permease, TyrP, of E. coli, and the tryptophan transporters TnaB and Mtr of E. coli. [Transport and binding proteins, Amino acids, peptides and amines]
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