# OC Root 2nd 3rd 4th 5th PC Gene/Definition OC.40720 Bacteria.491931 Proteobacteria.103462 Alphaproteobacteria.138484 Rhizobium.31481 rga.4550 rga:RGR602_PB00412 dipeptide/oligopeptide ABC transporter ATP-binding protein; K02031 peptide/nickel transport system ATP-binding protein