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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Electroporation and expression of the broad host-range plasmid pRK2501 in Azotobacter vinelandii.

Azotobacter vinelandii cells were transformed via high-voltage electroporation, with the broad host-range plasmid pRK2501. The number of transformants was dependent on the applied voltage, capacitance, and recovery procedure after electroporation. For example, Log, 4.44 transformants microgram-1 DNA were recovered in the A. vinelandii cell suspension electroporated at 1500 V and 25 microF capacitance (time constant 29.0 ms) and recovered on LB agar amended with 0.5 microgram/ml-1 kanamycin (pRK2501 encodes for both kanamycin and tetracycline resistance). Electroporation at 2500 V and capacitance settings of 25 and 3 microF did not produce any transformants. Cell survival was also poor at high voltages. A. vinelandii transformants were not recovered on N-free agar medium. In addition, no viable cells were recovered on N-free agar after electroporation at 2500 V, 25 microF; 2500 V, 3 microF; and 1500 V, 25 microF. Electroporation may be a useful method to genetically transform Azotobacter species for use in physiological and/or genetic studies.[1]


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