# OC Root 2nd 3rd 4th PC Gene/Definition OC.189164 Bacteria.1223817 Proteobacteria.776580 Gammaproteobacteria.424894 hch.3659 hch:HCH_03947 Isopropylmalate/homocitrate/citramalate synthases; K01640 hydroxymethylglutaryl-CoA lyase [EC:4.1.3.4]