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

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348 Kösel et al.<br />

Fig. 1. Schematic drawing summarizing the essential steps of nonradioactive PCR sequencing<br />

using digoxigenin.<br />

in the kit are 1× TE: 10 mM Tris-HCl, pH 8.0, 1 mM EDTA (6); 80% isopropanol; and<br />

2-mL disposable syringes (one per reaction) or, alternatively, Microcon-30 Concentrators<br />

(#42410, Amicon, Beverly, MA).<br />

3. Eppendorf tubes (15 mL).<br />

4. Eppendorf centrifuge (#5415C Eppendorf, Hamburg, Germany).<br />

5. Fluorometer (TKO 100, Hoefer, San Francisco, CA) for quantification of template<br />

concentrations using DNA dye Hoechst No. 33258 and calf thymus standard DNA<br />

(supplied with the fluorometer).<br />

2.2. Sequencing Reactions<br />

1. Sequencing primer, 5′digoxigenin end-labeled (1 pmol/µL), desalted, and HPLC-purified<br />

(see Note 2).<br />

2. Mineral oil (M-5904, Sigma, St. Louis, MO).<br />

3. Dig Taq DNA Sequencing Kit (#1449443, Boehringer Mannheim, Mannheim, Germany),<br />

containing Taq DNA polymerase (3 U/µL); sequencing buffer (250 mM Tris-HCl,

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