# OC Root 2nd 3rd 4th PC Gene/Definition OC.40731 Bacteria.23912 Proteobacteria.81523 Gammaproteobacteria.430725 mars.1802 mars:A8C75_09145 ABC transporter ATP-binding protein; K02031 peptide/nickel transport system ATP-binding protein; K02032 peptide/nickel transport system ATP-binding protein