preferred_name: fumarate(in) + 2 H(+)(in) <=> fumarate(out) + 2 H(+)(out)
preferred_name_lc: fumarate(in) + 2 h(+)(in) <=> fumarate(out) + 2 h(+)(out)
label: fumarate(in) + 2 H(+)(in) <=> fumarate(out) + 2 H(+)(out)
label_lc: fumarate(in) + 2 h(+)(in) <=> fumarate(out) + 2 h(+)(out)