November 16

11/14 ~ Filtering webbed plates and calculating the titer strength

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Rationale: Filtered the flooded plates (Two of them) to obtain a new lysate (Lysate 6), and prepared serial dilutions to figure out the titer of lysate 5 and 6

 

Procedure:

  • Created an aseptic zone to prevent contamination of the experiment / procedure
  • Obtained the flooded plates from refrigeration and obtained a tube top filter
  • Utilized the vacuum hose in the hood to filter the lysate(s) through a 22μL filter
    • Named the new lysate Lysate 6
  • Created 10^-1, 10^-2 and 10^-3 dilutions for both lysate 5 and 6
    • Created by adding 90μL of PB to a micro-centrifuge tube and adding 10μL of the previous strength lysate
  • Obtained 6 vials of 0.5mL arthrobacter and added 10μL of each lysate into each tube respectively
  • Obtained a 50mL conical vial and pipetted in 14mL LB Broth, 17.5mL 2xTA and 157.5μL CaCl2
  • Immediately pipetted 4.5mL into each arthrobacter + lysate tube and plated
  • Allowed the plates (7 total) to settle for 15 minutes and then moved to incubation

 

Observations:

  • For lysate 6, obtained about 10mL total of lysate
  • For filtering the flooded plate, used a tube top filter rather than a syringe filter

 

Next Steps/Conclusion: Will be coming in on Friday to check the status of the plates. If positive, will calculate the titer strength of lysate 5 and 6. If negative, will have to repeat the procedure.


Posted November 16, 2018 by justin_yu1 in category Justin Yu

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