# OC Root 2nd 3rd 4th 5th PC Gene/Definition OC.210016 Bacteria.272894 Proteobacteria.225447 Other_proteobacteria.6933 Mariprofundus.1317 maes.304 maes:Ga0123461_0277 iron complex transport system substrate-binding protein; K06858 vitamin B12 transport system substrate-binding protein OC.210016 Bacteria.272894 Proteobacteria.225447 Other_proteobacteria.6933 Mariprofundus.1317 mfn.1946 mfn:Ga0123462_1991 iron complex transport system substrate-binding protein