preferred_name: glycine(in) + n H(+)(out) => glycine(out) + n H(+)(in)
preferred_name_lc: glycine(in) + n h(+)(out) => glycine(out) + n h(+)(in)
label: glycine(in) + n H(+)(out) => glycine(out) + n H(+)(in)
label_lc: glycine(in) + n h(+)(out) => glycine(out) + n h(+)(in)