# OC Root 2nd 3rd 4th 5th PC Gene/Definition OC.509836 Bacteria.495575 Proteobacteria.118934 Alphaproteobacteria.9627 Yangia.1598 yan.2730 yan:AYJ57_13745 heme biosynthesis protein HemY OC.509836 Bacteria.495575 Proteobacteria.118934 Alphaproteobacteria.9627 Yangia.1598 ypac.1281 ypac:CEW88_06560 iron-sulfur cluster assembly accessory protein