Genetics - cis-Transposition of Bacteriophage Mu

Jeff Lawrence (G31)

1. Make a Mu lysate from an appropriate dilysogen.

2. Grow overnight culture of recipient cells. This can be wild-type E. coli or a mus mutant of S. typhimurium. The recipient should not be expressing the MuC repressor.

- For Mud1 hops, transfect any recipient.
- For MudA hops, transfect a recipient with an amber suppressor.

3. Make two serial 10-fold dilutions of Mu lysate in T2 buffer. Combine 100 µL cells with 100 µL of each lysate dilution in a separate tube. Use 100 (neat), 10-1, and 10-2 dilutions.

4. Incubate at 30° for 60 min.

5. Plate on selective media and grow at 30°.

6. Pick transductants and streak for single colonies on green plates. Grow overnight at 30°.

Last Update: Thursday June 19 2014
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Eric Kofoid eckofoid at
7. Choose light colonies and store.