dnaK operon

[jmaekawa at nih.go.jp]

I seek the paper about an unique dnaK operon.
Generally, dnaK operon consists dnaK-dnaJ, in this order. 
I have heard a dnaK operon which was formed dnaJ-dnaK, i.e. reverse order.
But I can not remember which journal contained the paper,
and I could not find the paper using Medline.
Please imform me the paper or something to describe the unique dnaK operon.
$B!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!(JThanks, Junko Amemura-Maekawa
                                                                        
jmaekawa at nih.go.jp