# OC Root	2nd	3rd	4th	PC	Gene/Definition
OC.189481	Bacteria.292007	Actinobacteria.83928	Nocardioides.1430	nca.3660	nca:Noca_3759   sodium/proton antiporter, CPA1 family
OC.189481	Bacteria.292007	Actinobacteria.83928	Nocardioides.1430	ndk.2205	ndk:I601_2251   nhaP2_2; K(+)/H(+) antiporter NhaP2
OC.189488	Bacteria.343782	Actinobacteria.121113	Nocardioides.6246	ndk.3096	ndk:I601_3186   nhaG; Na(+)/H(+) antiporter NhaG