# OC Root 2nd 3rd 4th PC Gene/Definition OC.29775 Archaea.7978 Crenarchaeota.13914 Aeropyrum.1235 ape.811 ape:APE_1223.1 cystathionine beta-synthase; K01697 cystathionine beta-synthase [EC:4.2.1.22] OC.29775 Archaea.7978 Crenarchaeota.13914 Aeropyrum.1235 acj.773 acj:ACAM_0775 cystathionine beta-synthase; K01697 cystathionine beta-synthase [EC:4.2.1.22]