# OC Root 2nd 3rd 4th 5th PC Gene/Definition OC.226762 Bacteria.396865 Proteobacteria.289929 Epsilonproteobacteria.10681 Sulfurovum.734 sun.331 sun:SUN_0291 heme d1 biosynthesis protein NirJ OC.226762 Bacteria.396865 Proteobacteria.289929 Epsilonproteobacteria.10681 Sulfurovum.734 slh.1795 slh:YH65_09610 radical SAM protein