Phylogenetic analysis by neighbor-joining of putative
two-component open reading frames (ORFs) from the histidine
kinase IV groups ahk40–43. Group
ahk40 = MaceMA3066, MmazMM0328, AfulAF1040 and
Mbur_401647520; group ahk41 = MaceMA0014,
MmazMM1325 and MbarA_0984; group ahk42 =
PAB1332, PH0484, Tkod_610170420/30 and MmarMMP0927; and
group ahk43 = HaloVNG0971G, HmarrnAC2205,
NphaNP2172A and Mhun_401793120. The bacterial ORFs are
CtetaniE17170, TmaritimaMSB_824070 and HpyloriHP0392.
Abbreviations: CtetaniE17170 = C.
tetaniE88_1817170; TmaritimaMSB_824070 = T.
maritima; and HpyloriHP0392 = H. pylori.