Microcontact printing (μCP) is aneasy andefficientway of producing patterns of self-assembledmonolayers (SAM) containing different functional groups. We have developed a simple and convenient μCP-based technique for the modification of a mica substrate with 3-aminopropyltriethoxysilane (APTES) and the micropatterning of proteins (chicken IgG and rabbit IgG) on the modified mica surface. Our approach provides a quick and easy way to produce protein patterns on solid surfaces. The printed immunoglobulin patterns were detected by exposing the substrate to solutions containing fluorescently labeled complementary anti-IgGs, and the formed immunoassays were studied using fluorescence microscopy. Copyright 2005 John Wiley & Sons, Ltd.