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