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