# OC Root 2nd 3rd 4th 5th 6th PC Gene/Definition OC.662443 Bacteria.1029617 Proteobacteria.481838 Betaproteobacteria.106302 Nitrosomonas.4790 Nitrosomonas_sp_.2854 nii.2611 nii:Nit79A3_2977 transglutaminase domain-containing protein