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We report here a new amino-modifier reagent, which enable high-throughput purification of amino-modified oligonucleotides. Either monomethoxytrityl (MMT) or trifluoroacetyl (TFA) group has been used as the protecting group for the primary amine when amino-terminal oligonucleotides are prepared. Generally, the removal of MMT requires the stringent acidic treatment after the oligonucleotide synthesis. We chemically synthesized a novel amino-modifier with the MMT protection. It was found that the new amino-modifier released MMT group under mild acidic condition, and then rapid purification of diverse amino-modified oligonucleotides could be achieved with cartridge column of reverse phase. Furthermore, we tried to construct the new detection system to study gene expression using the amino-modified oligonucleotides. The new amino-modifier will be useful for molecular biology by facilitating the construction of oligonucleotide library and improving the chemical reactivity.

High throughput purification of amino-modified oligonucleotides and its application to novel detection system of gene expression