Abstract
Based on electron microscopy and NMR spectroscopy it is deduced that Eco SSB binds with moderate cooperativity to polynucleotides. Evidence is provided that the protein binds in its tetrameric form to the nucleic acid forming a nucleosome-like structure. NMR-spectroscopic analysis of the complexes shows that the carboxy-terminal region of the Eco SSB maintains a high flexibility even when the protein is immobilized in large protein-protein clusters.
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