# OC Root 2nd 3rd 4th 5th 6th PC Gene/Definition OC.40616 Bacteria.24250 Proteobacteria.37069 Alphaproteobacteria.105888 Bradyrhizobium.19989 Bradyrhizobium_sp_.26130 brk.3218 brk:CWS35_16845 dppD; dipeptide ABC transporter ATP-binding protein DppD; K02031 peptide/nickel transport system ATP-binding protein