# OC Root 2nd 3rd 4th PC Gene/Definition OC.252501 Archaea.17109 Euryarchaeota.16593 - mla.1357 mla:Mlab_1406 phosphoribosyl-AMP cyclohydrolase; K01496 phosphoribosyl-AMP cyclohydrolase [EC:3.5.4.19] OC.252501 Archaea.17109 Euryarchaeota.16593 Methanoculleus.1644 mem.1960 mem:Memar_2006 phosphoribosyl-AMP cyclohydrolase; K01496 phosphoribosyl-AMP cyclohydrolase [EC:3.5.4.19] OC.252501 Archaea.17109 Euryarchaeota.16593 Methanoculleus.1644 mbg.268 mbg:BN140_0259 hisI; phosphoribosyl-AMP cyclohydrolase; K01496 phosphoribosyl-AMP cyclohydrolase [EC:3.5.4.19] OC.252501 Archaea.17109 Euryarchaeota.16593 Methanoculleus.1644 mema.372 mema:MMAB1_0327 hisI; Phosphoribosyl-AMP cyclohydrolase; K01496 phosphoribosyl-AMP cyclohydrolase [EC:3.5.4.19] OC.252501 Archaea.17109 Euryarchaeota.16593 - mpi.1709 mpi:Mpet_1816 Phosphoribosyl-AMP cyclohydrolase; K01496 phosphoribosyl-AMP cyclohydrolase [EC:3.5.4.19] OC.252501 Archaea.17109 Euryarchaeota.16593 Methanoregula.571 mbn.1835 mbn:Mboo_1916 Phosphoribosyl-AMP cyclohydrolase; K01496 phosphoribosyl-AMP cyclohydrolase [EC:3.5.4.19] OC.252501 Archaea.17109 Euryarchaeota.16593 Methanoregula.571 mfo.1032 mfo:Metfor_1060 phosphoribosyl-AMP cyclohydrolase; K01496 phosphoribosyl-AMP cyclohydrolase [EC:3.5.4.19] OC.252501 Archaea.17109 Euryarchaeota.16593 - mpl.708 mpl:Mpal_0688 Phosphoribosyl-AMP cyclohydrolase; K01496 phosphoribosyl-AMP cyclohydrolase [EC:3.5.4.19] OC.252501 Archaea.17109 Euryarchaeota.16593 Methanocella.507 mpd.658 mpd:MCP_0573 hisI; phosphoribosyl-AMP cyclohydrolase; K01496 phosphoribosyl-AMP cyclohydrolase [EC:3.5.4.19] OC.252501 Archaea.17109 Euryarchaeota.16593 Methanocella.507 mez.1472 mez:Mtc_1541 hisI; phosphoribosyl-AMP cyclohydrolase; K01496 phosphoribosyl-AMP cyclohydrolase [EC:3.5.4.19] OC.252501 Archaea.17109 Euryarchaeota.16593 Methanocella.507 rci.1480 rci:RCIX21 hisI; phosphoribosyl-AMP cyclohydrolase; K01496 phosphoribosyl-AMP cyclohydrolase [EC:3.5.4.19]