The prokaryotic Hsp70 protein family includes DNA K, HSCA (Hsc66), and HscC (Hsc62) (1). DNAK interacts with DNAJ and GrpE heat shock protein chaperones to fold substrate proteins in an ATP-driven cycle (2). These proteins are also involved in cell protection from environmental stress and other functions which are vital for a living cell. And like eukaryotic Hsp70 homologs, DNAK participates in the assembly/disassembly of protein complexes (3, 4).