Daniel:Notebook/PosSequencing/2017-5-10: Difference between revisions

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<li>Bead Binding</li>
<li>Bead Binding</li>
<ol type="A">
<ol type="A">
<li>Suspend 0.5 uL (20 ug, ~5M beads designed at 1.25 pmol) beads in 100 uL Dynabuffer</li>
<li>Suspend 1 uL (10 ug, ~5M beads designed at 2.5 pmol) beads in 100 uL Dynabuffer</li>
<li>Apply magnet for 30 sec and remove supernatant</li>
<li>Apply magnet for 30 sec and remove supernatant</li>
<li>Suspend in 20 uL Dynabuffer (conc. 1 ug/uL)</li>
<li>Suspend in 20 uL Dynabuffer (conc. 1 ug/uL)</li>

Revision as of 15:48, 10 May 2017

Bead Binding Test 2

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The experiment is building from the confusing results from Monday. Basically I can't tell if the hybridization of the dye probes worked or not. The signal is just too low. This experiment will test oligo binding using DAPI, which should give clear results for dsDNA (the original molecule) vs ssDNA (after melting).

Protocol

Sample Matrix

Sample # Condition
1 Barcode Oligo 2
2 Barcode Oligo 2-No Melting


  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 20 uL Dynabuffer (conc. 1 ug/uL)
    4. Add 5 uL barcode oligo and up to 15 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 DAPI; 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 TE-Triton 0.1% (TE-T)
    2. Melt off the complementary DNA strand by incubating the sample at 95°C for 3 minutes
    3. Magnet pull-down for 1 minute and remove supernatant
    4. Add 100 μL of TE-T and mix; Magnet pulldown and remove supernatant
    5. Add 100 μL of TE-T 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
  3. Fluorescent Oligo Binding (All samples)
    1. Resuspend beads in 25 uL 4X SSC buffer
    2. Make the following 3.1X (1X) dye hybridization buffer
      1. 6.2 (2 ea; 6 total) each uL 10 uM dye; dcprobe6-488, dcprobe6-Cy3, dcprobe6-Cy5
      2. 46.5 (15) uL formamide
      3. 12.4 (4) uL nfH2O
    3. Incubate probes at 80C for 5 minutes
    4. Add 25 uL fluorescent probe in 60% formamide to each sample
    5. Incubate at room temp in the dark for 30 min
    6. Wash twice in 2X SSC
    7. Resuspend in 40 uL 2XSSC or 20 uL 2X SSC