# OC Root 2nd 3rd PC Gene/Definition OC.29765 Archaea.83261 Euryarchaeota.69180 mear.307 mear:Mpt1_c03020 cysteine synthase; K12339 S-sulfo-L-cysteine synthase (O-acetyl-L-serine-dependent) [EC:2.5.1.144]