A complex includes: (1) a probe containing a heteropolymeric probe sequence of nucleic acids or nucleic acid analogues; and (2) a target containing a heteropolymeric target sequence of nucleic acids or nucleic acid analogues, wherein: (a) at least one of the probe and the target is purified or synthetic;...http://www.google.com/patents/US6656692?utm_source=gb-gplus-sharePatent US6656692 - Parallel or antiparallel, homologous or complementary binding of nucleic acids or analogues thereof to form duplex, triplex or quadruplex complexes
