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