Daniel:Notebook/PosSequencing/2017-5-17

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Revision as of 18:50, 17 May 2017 by >Djacobse (→‎Protocol)
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Bead Binding Test 3-Alkaline Denaturation

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Avidin-Biotin Bonds Paper

Trying to test the bead binding and denaturation on the beads again. This time we'll use high pH as the denaturant. From the paper above it says the streptavidin bond is stable to about pH 11, and according to this website DNA denaturation occurs at pH>10. I will use the alkaline lysis solution from Andrew's notes

Alkaline Lysis Solution

  • 97 ul Nuclease free H2O.
  • 1 ul 100 mM KOH
  • 2 ul 0.5 M EDTA

Neutralization Solution

  • 3 mL H20
  • 3 mL 2M Tris-HCl
  • 4 mL 1N HCl

Protocol

Sample Matrix

Sample # Condition uL 100mM KOH in 100 uL uL 1 mM KOH in 100 uL uL 0.5 M EDTA uL nfH2O
1 pH 12 10 NA 2 88
2 pH 11 1 NA 2 97
3 pH 10 NA 10 2 88
4 pH 9 NA 1 2 97
5 No denaturation 0 0 2 98


  1. Bead Binding
    1. Suspend 1 uL (10 ug, ~5M beads designed at 2.5 pmol) beads in 100 uL Dynabuffer
    2. Apply magnet for 30 sec and remove supernatant
    3. Suspend in 10 uL Dynabuffer (conc. 1 ug/uL)
    4. Add 5 uL barcode oligo and up to 5 uL nfH2O per sample to bead solution; incubate at RT for 15 min
    5. Wash beads with 100 uL wash buffer; vortex to suspend; apply magnet and remove supernatant
    6. Add 100 uL wash buffer and 1 uL SYBR; incubate in the dark for 5 minutes;
    7. Add 15 uL to a slide for analysis
    8. Remove the rest of the supernatant after bead pulldown
  2. Melting
    1. Resuspend in 100μL of Alkaline Solution-See Sample Matrix above
    2. Wait 3 minutes
    3. Magnet pull-down for 1 minute and remove supernatant
    4. Add 100 μL of wash buffer and mix; Magnet pulldown and remove supernatant
    5. Add 100 μL of wash buffer and mix
    6. Add 15 uL to a slide for analysis
    7. Remove the rest of the supernatant after bead pulldown
    8. Hold here and wait for results from slides