A Nucleic acid ligand "Biochip" is disclosed, consisting of a solid support to which one or more specific Nucleic acid ligands is attached in a spatially defined manner. Each Nucleic acid ligand binds specifically and avidly to a particular Target molecule contained within a Test mixture, such as a Bodily...http://www.google.fr/patents/US6242246?utm_source=gb-gplus-shareBrevet US6242246 - Nucleic acid ligand diagnostic Biochip