User:Eric Ma/Notebook/MICB323 Lab Book/2009/02/10: Difference between revisions

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# Crystal and Mark did the spinning + extraction of lysates.
# Crystal and Mark did the spinning + extraction of lysates.
# Sunny and I will do the recombinant virus samples; Mark and Crystal will do the wild-type virus samples.
# Sunny and I will do the recombinant virus samples; Mark and Crystal will do the wild-type virus samples.
## Sunny does BCA assay
## Sunny does BCA assay. <b>(This did not happen.)</b>
## I do BSA assay.
## I do BSA assay. <b>(This did not happen. See below)</b>


===Problem: SDS Added to Recombinant Viral Lysates===
===Problem: SDS Added to Recombinant Viral Lysates===

Revision as of 17:39, 1 March 2009

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Part 1: Agarose Gel of Plasmid DNA from Previous Lab

  • Conditions Used:
    • 100 mL of 0.7% agarose gel + 10µL SYBR Safe Stain

Summary of Tube Labels

    • EM1-4 EcoRI - Manipulation of EcoRI concentration for digestion of isolated pDNA
    • EM1-4 NaCl - Manipulation of NaCl concentration for digestion of isolated pDNA
    • EM#1-2 - Isolated plasmid DNA from CaCl2 (#1: transformed) and (#2: untransformed)
    • EM1-3 - Digested plasmid DNA from CaCl2 (#1: transformed), (#2: untransformed),(#3: Sunny's Part 2)


Lanes on the gel and volumes added to the wells

  1. Supercoiled Ladder (10µL)
  2. 380 and 1000 standard (10µL)
  3. EM1 - Transformed and digested pDNA from CaCl2 (10 µL Sample + 2µL 6X Loading Buffer)
  4. EM#1 - Isolated transformed pDNA from CaCl2 (10 µL Sample + 2µL 6X Loading Buffer)
  5. EM2 - Untransformed and digested pDNA from CaCl2 (10 µL Sample + 2µL 6X Loading Buffer)
  6. EM#2 - Isolated untransformed pDNA from CaCl2 (10 µL Sample + 2µL 6X Loading Buffer)
  7. EM3 - Isolated p421 plasmid DNA inserted via CaCl2 (10 µL Sample + 2µL 6X Loading Buffer) (Note: From Sunny)
  8. EM#3 - Digested p421 plasmid DNA inserted via CaCl2 (10 µL Sample + 2µL 6X Loading Buffer) (Note: From Sunny)
  9. Ligation Reaction (8µL including 1.5µL of 6X Loading Buffer)
  10. Mass Ruler (10 µL)
  11. EM1 EcoRI (18 µL)
  12. EM2 EcoRI (18 µL)
  13. EM3 EcoRI (18 µL)
  14. EM4 EcoRI (18 µL)
  15. EM1 NaCl (18 µL)
  16. EM2 NaCl (18 µL)
  17. EM3 NaCl (18 µL)
  18. EM4 NaCl (18 µL)
  19. Mass Ruler (10 µL)

Gel was run for 1 hour @ 120 volts. Noticed that the samples in lanes 3, 5 and 7 had a tendency to float off.

Part 3: Determination of Viral Lysate Protein Concentrations using the Bradford and Bicinchoninic Acid Protein Assays

Notes

  1. Crystal and Mark did the spinning + extraction of lysates.
  2. Sunny and I will do the recombinant virus samples; Mark and Crystal will do the wild-type virus samples.
    1. Sunny does BCA assay. (This did not happen.)
    2. I do BSA assay. (This did not happen. See below)

Problem: SDS Added to Recombinant Viral Lysates

  • Mark added SDS to the recombinant viral lysates by accident.
  • This would cause problems - volumes are wrong, and all the protein would be denatured.
  • 50 µL + 200 µL = 250 µL total volume. The lysate is 4/5 as concentrated as it is supposed to be.
  • Unable to do BSA Assay
  • Hence, I did the BCA Assay along with Mark, using the (need to find out - did we use the recombinant or wild-type virus?) virus.
  • See lab manual for changes made.
    • We did a 1/3 dilution of each viral lysate rather than a 1/4 dilution, putting in 40µL of viral lysate and 80µL of sterile distilled H2O.



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