Cloning of the type Ib trimethoprim-resistant dihydrofolate reductase gene and preparation of a specific biotinylated DNA probe.

Abstract

A 3.0-kb PstI/HindIII fragment encoding the type Ib trimethoprim-resistant dihydrofolate reductase (DHFR) was cloned into pUC18. Following successive subcloning, the type Ib DHFR gene was identified within a 500 bp HincII fragment. The 500 bp fragment was purified, biotinylated and tested for its suitability as a specific DNA probe in non-isotopic… (More)

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