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John M. S. Bartlett.pdf - Bio-Nica.info

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378 Quivy and Becker<br />

2. Solution of 40% PEG 8000 (Sigma), filtered through a 0.22-µm filter. It will take some<br />

time to dissolve the PEG in water. Incubate at room temperature on a rotating wheel for<br />

several hours. It also takes some force to filter the solution using a syringe.<br />

3. T4 DNA ligase, 400 U/µL (NE <strong>Bio</strong>labs).<br />

4. Annealed linker (see Subheading 3.4.).<br />

2.6. PCR<br />

1. TE: 10 mM Tris-HCl, pH 8.5; 1 mM EDTA, pH 8.5.<br />

2. Phenolchloroformisoamyl alcohol (25241; Aurresco).<br />

3. Solution of 7.5 M ammonium acetate containing 25 µg/mL yeast tRNA (Boehringer<br />

Mannheim). Crude yeast tRNA has to be cleaned by multiple organic extractions and<br />

ethanol precipitation.<br />

4. Vent buffer (see Subheading 2.4.).<br />

5. dNTP solution (see Subheading 2.4.).<br />

6. 100 mM MgSO 4 .<br />

7. P2 solution, 10 pmol/µL (see Subheading 2.2.).<br />

8. Long-linker primer, 10 pmol/µL (see Subheading 2.2.).<br />

9. Vent DNA polymerase 2 U/µL (NE <strong>Bio</strong>labs).<br />

10. Perkin–Elmer thermal cycler.<br />

11. PCR tubes (Perkin–Elmer).<br />

12. Mineral oil (PCR-grade).<br />

2.7. Tag Selection of the PCR Products<br />

1. Dynabeads M-280 streptavidin (Dynal, Oslo, 10 mg/mL).<br />

2. Magnetic particle concentrator (MPC, Dynal).<br />

3. Phosphate-buffered saline (PBS), pH 7.4.<br />

4. PBS, pH 7.4; 0.01% BSA (molecular biology grade).<br />

5. BW solution: a 11 mixture of TE and 5 M NaCl.<br />

2.8. Sequencing Reaction (see Note 7)<br />

1. MPC.<br />

2. 150 mM NaOH, freshly prepared.<br />

3. TE, pH 7.5.<br />

4. Vent buffer (see Subheading 2.4.).<br />

5. Termination mixes made up in 1× vent buffer:<br />

A-mix: 900 µM ddATP, 30 µM dATP, 100 µM dCTP, 100 µM dGTP, 100 µM dTTP.<br />

C-mix: 480 µM ddCTP, 30 µM dATP, 37 µM dCTP, 100 µM dGTP, 100 µM dTTP.<br />

G-mix: 400 µM ddGTP, 30 µM dATP, 100 µM dCTP, 37 µM dGTP, 100 µM dTTP.<br />

T-mix: 720 µM ddTTP, 30 µM dATP, 100 µM dCTP, 100 µM dGTP, 33 µM dTTP.<br />

6. Labeled P3 (see Subheading 3.3.).<br />

7. Circumvent sequencing buffer 10×: 100 mM KCl, 100 mM (NH 4 ) 2 SO 4 , 200 mM Tris-HCl,<br />

pH 8.8, 50 mM MgSO 4 (NE <strong>Bio</strong>labs).<br />

8. Triton X-100 solution, 3% (v/v) in water.<br />

9. Vent Exo DNA polymerase, 2 U/µL (NE <strong>Bio</strong>labs).<br />

10. Formamide loading buffer (see Subheading 2.2.).<br />

11. Sequencing gel.<br />

12. Fixing solution: 10% acetic acid, 10% methanol.<br />

13. Dupont NEN reflection films and corresponding cassettes.

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