O-phospho-L-serine + hydrogen sulfide + H(+) <=> L-cysteine + phosphate
o-phospho-l-serine + hydrogen sulfide + h(+) <=> l-cysteine + phosphate
O-phospho-L-serine + hydrogen sulfide + H(+) <=> L-cysteine + phosphate
o-phospho-l-serine + hydrogen sulfide + h(+) <=> l-cysteine + phosphate