part of part of has input has input has output has output process taurine from L-cysteine: step 1/2 1 1 1 1 1 1 L-cysteine + 1 sulfite => 1 L-cysteate + 1 hydrogen sulfide. enzymatic_reaction GO:0047803 UPa:UER00540 EC:4.4.1.10 taurine from L-cysteine sulfite L-cysteine hydrogen sulfide L-cysteate