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<P><SPAN style="%"><STRONG><FONT color=#9c0000 size=5>Aptamer biosensor for label-free impedance spectroscopy detection of proteins based on recognition-induced switching of the surface charge</FONT></STRONG></SPAN></P>
<P><SPAN style="%"><FONT size=5><EM><STRONG>Chem. Commun.</STRONG></EM>, 2005,&nbsp;4267 - 4269, </FONT></SPAN></P>
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