Unrooted molecular tree of TFB protein family. Newly identified TfbF proteins from H. lacusprofundi (Hl), N. asiatica (Na), and H. gomorrense (Hg) and TfbG from H. lacusprofundi show orthology with TfbF and TfbG of H. sp. NRC-1. Orthology was supported by the high bootstrap scores (numbers on the branch) generated by 1000 replicates. The results suggest similar structural and functional characteristics between TFB proteins among the halophiles.