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The structure of ZNF191(243-368), the zinc finger region protein of zinc finger protein ZNF191, and its structural change upon thermal and EDTA-induced denaturation were investigated by the Raman spectroscopy. It was demonstrated that the coordination between Zn2+ and His/Cys in ZNF191(243-368) is the essential factor to the stability of zinc finger, which plays an important role in maintaining the hydrophobic core and the secondary structure in zinc finger, and the Raman spectroscopy is a powerful tool for investigating the structure of ZNF191(243-368).