SI-1 Supporting Information Electrokinetic Lab-on-a-BioChip for Multi-Ligand/Multi-Analyte Biosensing Ganeshram Krishnamoorthy, Edwin T. Carlen, Hans L. de Boer, Albert van den Berg and Richard B. M. Schasfoort BIOS Lab-on-a-Chip Group, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, the Netherlands. Tel.: 0031 53 4892724; Fax: 0031 53 4893595 Email: g.krishnamoorthy@tnw.utwente.nl