Cell surface receptor proteins and secreted protein ligands determine the specific connectivity of cells which drives the development of complex systems and organs in multicellular organisms. My laboratory is interested in the biochemistry, signaling activity and interaction networks of proteins that are required for the development and function of nervous systems. Specifically, we are working on deciphering protein-protein interaction networks of the extracellular space required for axon guidance and pruning and synapse formation and validation using high-throughout methods. We study these proteins using a multi-disciplinary approach, including crystallography, cellular signaling assays and protein engineering strategies coupled to genetic modifications in model organisms.