PMID: 6410388Jul 1, 1983Paper

Cloning of human purine-nucleoside phosphorylase cDNA sequences by complementation in Escherichia coli

Proceedings of the National Academy of Sciences of the United States of America
J M GoddardD W Martin

Abstract

We have obtained cDNA clones that contain the entire coding region of the human purine-nucleoside phosphorylase (PNP; EC 2.4.2.1) mRNA. The cDNA sequences were generated by reverse transcription of PNP-enriched mRNA obtained by immunoadsorption of HeLa cell polyribosomes with monospecific antibody to human PNP. cDNA molecules that were close in length to PNP mRNA were separated by agarose gel electrophoresis and inserted into the Pst I site of the plasmid pBR322. Plasmid DNA from the pooled clones was used to transform PNP-deficient Escherichia coli cells, and those transformants that phenotypically expressed PNP were isolated on selective media. The presence of human PNP in the selected bacterial cells was detected by immunoprecipitation with human PNP antibody.

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Jan 1, 1993·Molecular and Biochemical Parasitology·M P Barrett, R W Le Page
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