# OC Root 2nd 3rd 4th PC Gene/Definition OC.504714 Archaea.19797 Euryarchaeota.20336 Haloterrigena.4709 htu.1448 htu:Htur_1393 exsB protein; K06920 7-cyano-7-deazaguanine synthase [EC:6.3.4.20] OC.504714 Archaea.19797 Euryarchaeota.20336 Haloterrigena.1372 hda.451 hda:BB347_02135 7-cyano-7-deazaguanine synthase QueC; K06920 7-cyano-7-deazaguanine synthase [EC:6.3.4.20]