# OC Root 2nd 3rd 4th 5th 6th PC Gene/Definition OC.226764 Bacteria.577522 Proteobacteria.95742 Alphaproteobacteria.134308 Sulfitobacter.7740 Sulfitobacter_sp_.7679 suli.3506 suli:C1J05_18640 nirJ; heme d1 biosynthesis radical SAM protein NirJ