preferred_name: L-cysteine + H2O => hydrogen sulfide + pyruvate + NH4(+) + H(+)
preferred_name_lc: l-cysteine + h2o => hydrogen sulfide + pyruvate + nh4(+) + h(+)
label: L-cysteine + H2O => hydrogen sulfide + pyruvate + NH4(+) + H(+)
label_lc: l-cysteine + h2o => hydrogen sulfide + pyruvate + nh4(+) + h(+)