November
26
Lab Day 28: Serial Dilutions and Webbed Plate
Rationale
Created 10^-5 dilution to make a newly webbed plate in hope of flooding and creating a high titer.
Detailed Procedure
- 10 µL of “SJ 11/12/18 FS lysate 100” was added with 90 µL of phage buffer to create 10-1 dilution which was vortexed.
- 10 µL of 10-1 was added with 90 µL of phage buffer to create 10-2 dilution which was vortexed.
- 10 µL of 10-2 was added with 90 µL of phage buffer to create 10-3 dilution which was vortexed.
- 10 µL of 10-3 was added with 90 µL of phage buffer to create 10-4 dilution which was vortexed.
- 10 µL of 10-4 was added with 90 µL of phage buffer to create 10-5 dilution which was vortexed.
- Took 98 µL of 10-5 into 0.5 mL arthro. Set for 15 mins to infect.
- Took 4 mL of LB Broth, 5 mL of 2X TA, and 45 µL of 1M CaCl2 into 15 mL vial.
- Took 4.5 mL of top agar mixture and poured onto control plate.
- Took rest of top agar mixture and combined with arthro and 10-5 mixture.
- Took resulting solution and poured onto 10-5 plate.
- Allowed both plates to sit for 15 mins.
Conclusion/Next Steps
Since the calculations were 97.6 µL of 10-5 , only 98 µL were pipetted for easier pipetting. By next lab day, hopefully a webbed plate will be able to flood and make new plates to calculate the new titer. By Friday, hopefully a high titer will be calculated.