# OC Root 2nd 3rd 4th 5th PC Gene/Definition OC.40710 Bacteria.24172 Proteobacteria.191746 Alphaproteobacteria.61454 Rhodobacter.8124 rcp.733 rcp:RCAP_rcc00708 oppD1; oligopeptide ABC transporter, ATP-binding protein OppD-1; K02031 peptide/nickel transport system ATP-binding protein