L-alanyl-L-alanine(out) + 2 H(+)(out) => L-alanyl-L-alanine(in) + 2 H(+)(in)
l-alanyl-l-alanine(out) + 2 h(+)(out) => l-alanyl-l-alanine(in) + 2 h(+)(in)
L-alanyl-L-alanine(out) + 2 H(+)(out) => L-alanyl-L-alanine(in) + 2 H(+)(in)
l-alanyl-l-alanine(out) + 2 h(+)(out) => l-alanyl-l-alanine(in) + 2 h(+)(in)