The present invention provides novel methods for determining whether a cell has incorporated a polynucleotide comprising the use of organophosphate hydrolase activity as a marker which has both selectable and screenable properties.

 
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< Methods and apparatus for nucleic acid sequencing by signal stretching and data integration

< Seripancrin

> Derivatives of 4-(thio- or selenoxanthene-9-ylidene)-piperidine or acridine and its use as a selective 5-HT.sub.2B receptor antagonist

> Fungal strain acremonium sp.MT70646(KCTC 0916BP), novel compounds produced by this strain and their use
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