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

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298 Rithidech and Dunn<br />

Fig. 1. PCR amplification of the mouse microsatellites: D2Mit43 (242-210 bp), D2Mit107<br />

(134-112 bp, and D2Mit126 (160–190 bp) using genomic DNA isolated from the bone marrow<br />

cells of C3HeB/HeJ X C57BL/6J F1 Hybrid. Products were separated in a 6% nondenaturing<br />

PAGE (300.8 acrylamidebisacrylamide) run at 150 V (constant) for 3 h. The gel was stained<br />

with ethidium bromide (0.5 mg/mL) and photographed under ultraviolet light. The arrows<br />

indicate the position of the expected amplicons. The molecular markers (HaeIII digested<br />

pBR332 DNA) are shown in lanes M. The PCR products were obtained using five Touchdown<br />

cycles, and 20 cycles of constant annealing temperature (60°C). Lane 2 represents a control<br />

PCR without added mouse DNA. The sequences of primers are as follows:<br />

Acknowledgments<br />

This work was support by the U.S.DOE Contract ER62487/0001684.<br />

References<br />

1. Rithidech, K., Dunn, J. D., and Gordon, C. R. (1997) Combining multiples and touchdown<br />

PCR to screen murine microsatellite polymorphisms. <strong>Bio</strong>techniques 23, 36– 44.<br />

2. Chou, Q., Russell, M., Birch, D. E., Raymond, J., and Bloch, W. (1992) Prevention of<br />

pre-PCR mis-priming and primer dimerization improves low-copy-number amplifications.<br />

Nucleic Acids Res. 20, 1717–1723.<br />

3. Don, R. H., Cox, P. T., Wainright, B. J., Baker, K., and Mattick, J. S. (1991) Touchdown<br />

PCR to circumvent spurious priming during gene amplification. Nucleic Acids Res. 19,<br />

4008.<br />

4. Scrimshaw, B. J. (1992) A simple nonradioactive procedure for visualization of (dC-dA)n<br />

dinucleotide repeat length polymorphisms. <strong>Bio</strong>Techniques 13, 189.

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