# OC Root 2nd 3rd 4th PC Gene/Definition OC.40708 Bacteria.23905 Proteobacteria.191904 Gammaproteobacteria.430737 mars.1863 mars:A8C75_09455 ABC transporter ATP-binding protein; K02031 peptide/nickel transport system ATP-binding protein; K02032 peptide/nickel transport system ATP-binding protein