# OC Root 2nd 3rd 4th PC Gene/Definition OC.664542 Archaea.91089 Thaumarchaeota.3687 Nitrososphaera.4929 nvn.2767 nvn:NVIE_029020 hypothetical protein OC.664542 Archaea.91089 Thaumarchaeota.3687 - ndv.1956 ndv:NDEV_2049 protein of unknown function