Is likely involved in the transport of fructoselysine and psicoselysine to the cytoplasm, where they are degraded. N(6)-(D-fructosyl)-L-lysine(in) = N(6)-(D-fructosyl)-L-lysine(out) N(6)-(D-psicosyl)-L-lysine(in) = N(6)-(D-psicosyl)-L-lysine(out) Carbohydrate metabolism; fructoselysine degradation. Induced by fructoselysine. Makes part of the frl operon with FrlB, FrlC, FrlD and FrlR. Cells lacking this gene are unable to grow on fructoselysine or psicoselysine, where they do grow on glucose. Belongs to the amino acid-polyamine-organocation (APC) superfamily.