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Abstract

Methods for identifying differentially expresses genes and differences between genomic nucleic acid sequences are described. These methods typically include: (a) providing a tester DNA molecule with an amplification tag at the 5' and 3' ends of the molecule and a driver DNA or RNA molecule lacking said amplification tag; (b) hybridizing said tester and said driver molecules to form a reaction mixture, wherein said reaction mixture comprises a tester--tester homoduplex, a tester-driver heteroduplex, a driver--driver homoduplex, a single stranded driver DNA molecule and a single stranded tester DNA molecule; (c) treating said reaction mixture to reduce the number of single stranded molecules in said mixture; (d) treating said reaction mixture to remove said amplification tag from said tester-driver heteroduplex; and (e) amplifying said tester--tester homoduplex from said reaction mixture to form an amplification product, wherein steps (c) and (d) occur before step (e).

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First Claim