Status	Description	Organism	Genes	References
	tryptophan:proton symport	Escherichia coli	tnaB	[134]
	L-tryptophan reversible transport via proton symport (periplasm)	Escherichia coli	mtr
	L-tryptophan reversible transport via proton symport (periplasm)	Escherichia coli	aroP