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

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PRINS and Immunocytochemistry 457<br />

9. Washing buffer: 4 × SSC (diluted from 20 × SSC, see Subheading 2.1.2., item 15),<br />

0.05% Triton X 100.<br />

10. Blocking buffer: 4 × SSC (diluted from 20 × SSC, see Subheading 2.1.2., item 15), 0.05%<br />

Triton X 100, 5% dried skimmed milk powder.<br />

11. Glass slides (Menzel).<br />

12. Coplin jars.<br />

13. Cytocentrifuge (Shandon, Astmoor, UK).<br />

14. Waterbath at 70°C.<br />

15. Thermal cycler (Hybaid Omnigene Flatbed; Hybaid).<br />

16. Incubator at 37°C.<br />

2.2.2. Immunofluorescence Detection of Mitotic Spindle<br />

1. Mouse monoclonal anti-β-tubulin antibody (Sigma).<br />

2. TRITC-conjugated donkey anti-mouse IgG F(ab′)2 fragments (DAMTRITC; Jackson<br />

Immunoresearch, West Grove, PE).<br />

3. Normal goat serum (NGS).<br />

4. Vectashield (Vector).<br />

5. DAPI (see Subheading 2.1.2., item 11).<br />

6. TOTO-3 iodide (Molecular Probes, Eugene, OR).<br />

7. Blocking buffer: 1× PBS (diluted from stock 10× PBS, see Subheading 2.1.1., item 9),<br />

0.05% Triton X-100, 2-5% NGS.<br />

8. Washing buffer: 1× PBS (diluted from stock 10× PBS, see Subheading 2.1.1., item 9),<br />

0.05% Triton X-100.<br />

9. 1× PBS.<br />

10. Vectashield (Vector) containing 0.5 µg/mL DAPI or 3000× diluted TOTO-3 iodide (from<br />

1 mM stock in DMSO).<br />

11. Humid chamber.<br />

12. Coplin jar (50 or 100 mL).<br />

13. Fluorescence microscope, CCD camera, and confocal microscope (see Subheading 2.1.2.,<br />

items 27–30).<br />

2.3. Protocol 3<br />

2.3.1. Immunofluorescence Detection of Structural Proteins in Chromosomes<br />

1. Normal goat serum (NGS).<br />

2. Primary antibody.<br />

3. FITC-conjugated secondary antibody.<br />

4. Alcohol-cleaned glass slides and coverslips (Menzel).<br />

5. Hypotonic solution: 75 mM KCl.<br />

6. Potassium chromosome medium (KCM) solution: 120 mM KCl, 20 mM NaCl, 10 mM<br />

Tris-HCl, pH 8.0, 0.5 mM EDTA, and 0.1% (v/v) Triton X-100.<br />

7. Blocking buffer: KCM containing 2 to 5% NGS.<br />

8. Fixation solution: KCM containing 10% formalin (from 37% stock solution; Merck).<br />

9. Cytocentrifuge (Shandon).<br />

10. Coplin jar (50 or 100 mL).<br />

11. Humid chamber.<br />

2.3.2. PRINS DNA Labeling<br />

1. Immersion solution: 0.1 M NaOH.<br />

2. Neutralization solution: 0.01 M Tris-HCl, pH 7.4.

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