The study of DNA-protein interactions is gaining increased attention due to their importance in cellular processes. Only a well-functioning interaction guaranties that such a process can take place without errors. So far, only a small percentage of these interactions have been unraveled, partially due to their complexity but also due to the fact that there are only a few techniques that permit the study of these interactions. In this report we describe the development of a research tool based on tethered bead motion and Resonance Light Scattering (RLS) from gold beads. This method permits the study of DNA-protein interactions and the screening of proteins binding to a specific DNA sequence.