2. (Science: zoology) A European bird (Nucifraga caryocatactes), allied to the magpie and crow. Its colour is dark brown, spotted with white. It feeds on nuts, seeds, and insects. The American, or Clarke's, nutcracker (Picicorvus Columbianus) of western North America.
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... (virtual PCR). I tried to increase PCR stringency but I get only small improvement (annealing temp, Mg). Thanks in advanced for your responses Nutcracker
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