efflux of both tracer amino acids was accelerated by aminoisobutyric acid ( aib ) , l-serine , l-alanine , l-cysteine , l-threonine , glycine , branched-chain and large neutral amino acids , but affected negligibly by d-alanine , beta-alanine , meaib , l-arginine , l-aspartate , l-glutamate , taurine or d-mannitol .
C0010654
l-cysteine
C0301715
neutral amino acids