# OC Root 2nd 3rd 4th PC Gene/Definition OC.229152 Bacteria.295045 Firmicutes.293626 Firmicutes___Clostridia.169353 hor.244 hor:Hore_02240 imidazole glycerol phosphate synthase subunit hisF; K02500 imidazole glycerol-phosphate synthase subunit HisF [EC:4.3.2.10]