an S-substituted L-cysteine + H2O = a thiol + pyruvate + NH4(+)
an s-substituted l-cysteine + h2o = a thiol + pyruvate + nh4(+)
"L-cysteine-S-conjugate thiol-lyase (deaminating)"
"l-cysteine-s-conjugate thiol-lyase (deaminating)"