label: L-erythro-7,8-dihydrobiopterin(out) + a dicarboxylate(in) <=> L-erythro-7,8-dihydrobiopterin(in) + a dicarboxylate(out)
label_lc: l-erythro-7,8-dihydrobiopterin(out) + a dicarboxylate(in) <=> l-erythro-7,8-dihydrobiopterin(in) + a dicarboxylate(out)