The Amino Acid/Auxin Permease (AAAP) Family (TC# 2.A.18) is a family of secondary carrier proteins, a member of the APC Superfamily that includes hundreds of proteins from plants, animals, fungi and lower eukaryotes.
Six AAAPs in A. thaliana are well characterized and transport neutral and charged amino acids with varying specificities and affinities.
[1][2] Among animal AAAP family members are numerous growth regulating System A and System N isoforms, each exhibiting distinctive tissue and subcellular localizations.
Some catalyze H+ antiport and can function bidirectionally.
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