After synthesis, the oligodeoxynucleotides are deprotected at 55° in NH4OH for 12 hr. Purification of these synthetic oligodeoxynucleotides is accomplished by either high-performance liquid chromatography (HPLC) or polyacrylamide gel electrophoresis (PAGE).

High-Performance Liquid Chromatography

Reverse-phase chromatography is generally used to isolate and identify a particular synthetic oligodeoxynucleotide. In reversed-phase HPLC, the crude

65 S. I. Khan, A. E. Beilstein, M. T. Tierney, M. Sykora, and M. W. Grinstaff, Inorg. Chem. 38, 5999 (1999).

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