# OC Root 2nd 3rd 4th 5th 6th PC Gene/Definition OC.57006 Bacteria.301822 Proteobacteria.377068 Alphaproteobacteria.195252 Bradyrhizobium.20838 Bradyrhizobium_sp_.28640 brk.6123 brk:CWS35_32055 ABC transporter ATP-binding protein; K01996 branched-chain amino acid transport system ATP-binding protein