# OC Root 2nd 3rd 4th 5th 6th PC Gene/Definition OC.40661 Bacteria.24223 Proteobacteria.398059 Alphaproteobacteria.225707 Mesorhizobium.11252 Mesorhizobium_sp_.3943 meso.3858 meso:BSQ44_20080 peptide ABC transporter ATP-binding protein; K02031 peptide/nickel transport system ATP-binding protein