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Abstract
Transposable elements Tn5, Tn7, and Tn76 were transferred to Azotobacter beijerinckii. Evidence was obtained for the transposition of Tn5 but cells of the majority of presumptive transposition isolates had abnormal morphologies and rapidly lost viability when subcultured. Data are presented that indicate that plasmid RP4::Tn76 behaves as a suicide vector upon transfer to this host, allowing the isolation of A. Beijerinckii::Tn76 isolates at a high frequency. Nitrogenfixing mutants and leucine and adenine auxotrophs were isolated from cultures in which the transposition of Tn76 occurred.
Published Version
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