HdeA family
In molecular biology , the HdeA family of proteins ( HNS ( histone-like nucleoid structuring ) -dependent expression A ) is a stress response protein family found in highly acid resistant bacteria such as "Shigella flexneri" and "Escherichia coli" , but which is lacking in mildly acid tolerant bacteria such as "Salmonella" . 
<triplet> histone <subj> proteins <obj> subclass of <triplet> protein family <subj> proteins <obj> facet of