▁related ▁to ▁EF - Tu . ▁A ▁few ▁hom olog s ▁are ▁also ▁found ▁in ▁arch ae a , ▁but ▁the ▁functions ▁are ▁unknown . ▁ ▁As ▁a ▁target ▁ ▁El ong ation ▁factors ▁are ▁targets ▁for ▁the ▁to x ins ▁of ▁some ▁path og ens . ▁For ▁instance , ▁C ory ne b acter ium ▁di ph ther iae ▁produces ▁its ▁to x in , ▁which ▁al ters ▁protein ▁function ▁in ▁the ▁host ▁by ▁in activ ating ▁el ong ation ▁factor ▁( EF - 2 ). ▁This ▁results ▁in ▁the ▁path ology ▁and ▁sympt oms ▁associated ▁with ▁Di ph ther ia . ▁Like wise , ▁Pseud omon as ▁aer ugin osa ▁ex ot ox in ▁A ▁in activ ates ▁EF - 2 . ▁ ▁References ▁ ▁Further ▁reading ▁Al berts , ▁B . ▁et ▁al . ▁( 2 0 0 2 ). ▁M ole cular ▁Bi ology ▁of ▁the ▁Cell , ▁ 4 th ▁ed . ▁New ▁York : ▁Gar land ▁Science . ▁. ▁Berg , ▁J . ▁M . ▁et ▁al . ▁( 2 0 0 2 ). ▁Bio chem istry , ▁ 5 th ▁ed . ▁New ▁York : ▁W . H . ▁Fre eman ▁and ▁Company . ▁. ▁Singh , ▁B . ▁D . ▁( 2 0 0 2 ). ▁Fund ament als ▁of ▁Gen et ics , ▁New ▁Del hi , ▁India : ▁Kal y ani ▁Publish ers . ▁. ▁ ▁External ▁links ▁ ▁no bel p ri ze . org ▁Exp la ining ▁the ▁function ▁of ▁e