title: Efficient methods for attachment of thiol specific probes to the 3'-ends of synthetic oligodeoxyribonucleotides.
abstract: Methodology is described for the synthesis of DNA oligomers containing a free 3'-thiol group which can be selectively crosslinked with a wide variety of probes. This chemistry is compatible with both phosphotriester and phosphoramidite solid phase chemistry. Moreover, the sulphydryl group is introduced into the 3'-nucleoside solid support linkage prior to oligonucleotide synthesis. Consequently, no additional coupling steps are required after oligonucleotide synthesis, and isolation of the 3'-thiol oligonucleotide requires only one additional deprotection step. Cross-linking of the thiol-containing oligonucleotide to a fluorescent probe was carried out with high selectivity, in high yield, and under mild conditions.
mesh_terms: D001483:Base Sequence; D004247:DNA / Q000138:chemical synthesis*; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D009838:Oligodeoxyribonucleotides / Q000138:chemical synthesis*; D013438:Sulfhydryl Compounds
chemical_list: D007202:Indicators and Reagents; D009838:Oligodeoxyribonucleotides; D013438:Sulfhydryl Compounds; D004247:DNA