preferred_name: histamine(in) + 2 H(+)(out) = histamine(out) + 2 H(+)(in)
preferred_name_lc: histamine(in) + 2 h(+)(out) = histamine(out) + 2 h(+)(in)
label: histamine(in) + 2 H(+)(out) = histamine(out) + 2 H(+)(in)
label_lc: histamine(in) + 2 h(+)(out) = histamine(out) + 2 h(+)(in)