| http://www.w3.org/ns/prov#value | - Yet another embodiment of the invention is a composition for determining the presence or absence of a predetermined nucleic acid target sequence in a nucleic acid sample comprising an aqueous solution that contains: (A) a purified and isolated enzyme whose activity is to release one or more nucleotides from the 3??? terminus of a hybridized nucleic acid probe; and (B) pyrophosphate.
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