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