preferred_name: L-phenylalanyl-L-leucine(in) + H(+)(in) => L-phenylalanyl-L-leucine(out) + H(+)(out)
preferred_name_lc: l-phenylalanyl-l-leucine(in) + h(+)(in) => l-phenylalanyl-l-leucine(out) + h(+)(out)
label: L-phenylalanyl-L-leucine(in) + H(+)(in) => L-phenylalanyl-L-leucine(out) + H(+)(out)
label_lc: l-phenylalanyl-l-leucine(in) + h(+)(in) => l-phenylalanyl-l-leucine(out) + h(+)(out)