Schematic representation of the IFN-γ attached to the sensor surface.

<p>(a) Two real-time sensorgrams resulted from the interaction of the IFN-γ with the bithiophene biolinker- and dextran-coated surfaces of the sensor chip. (b) Comparison of sensor response among the control blank, IFN-γ immobilized on the bithiophene biolinker based biochip, and IFN-γ immobilized on the dextran-coated biochip.</p>