passages.id: split_1_test_1105_passage
passages.type: progene_text
passages.text: We purified His-FLAG - tagged versions of : ( i ) export components FliH , FliI , FliJ , FlhAC and FlhBC ; ( ii ) rod / hook - type export substrates FlgB ( rod protein ) , FlgE ( hook protein ) , FlgD ( hook capping protein ) and FliE ( basal body protein ) ; and ( iii ) filament - type export substrates FlgK and FlgL ( hook - filament junction proteins ) and FliC ( flagellin ) .