We have constructed a novel platform for the oriented buildup of immunoglobulins on a gold surface for a surface plasmon resonance imaging microarray. To this end, genetically engineered glutathione S-transferase proteins bearing one, two, and three Fc-specific B- domains in protein G from Streptococci (GST-GB1,-GB2, and-GB3, respectively) were produced. In order to tether these GST-GB x proteins specifically, a novel glutathione- ...