Another important experiment on our way to the establishment of the DiaCHIP was the immobilization of three different proteins on one slide (GFP, a rabbit- and a mouse-derived antibody). In this experiment the slide was sequentially flushed with three different antibodies, each specifically binding to one of the immobilized proteins. In three different outputs, dependent on the antibody, we received a highly specific binding at each spot. The corresponding binding curve shows the changes in relative light intensity at each spot. The occurring binding events are specific, except a slight cross-reactivity of the anti-mouse antibody (figure 8). Quotient pictures additionally visualize distinct binding of the respective antibodies to the corresponding protein (figure 9). This confirmed specific binding events of antibodies to proteins in our setup. With this promising result we were one step further towards our diagnostic application.