# OC Root 2nd 3rd 4th 5th 6th PC Gene/Definition OC.40748 Bacteria.23854 Proteobacteria.74445 Alphaproteobacteria.120587 Sinorhizobium.21734 Sinorhizobium_sp_.11251 six.4851 six:BSY16_5481 nikE; nickel import ATP-binding protein NikE; K02031 peptide/nickel transport system ATP-binding protein; K02032 peptide/nickel transport system ATP-binding protein