passages.id: split_4_validation_881_passage
passages.type: progene_text
passages.text: Our results show that the nir promoter contains a second IHF site at position - 115 ( IHF II ) and a third Fis site at position - 97 ( Fis III ) , and that IHF , Fis and FNR can bind together to form multiprotein complexes .