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