Patent ID: 7314923

Claim:
A probe for a gene or a primer for starting amplification comprising an oligonucleotide analogue immobilized on a solid support, the oligonucleotide analogue comprising two or more nucleoside units, wherein at least one of said nucleoside units is a structure of the formula (2): wherein: A represents a methylene group; and B is selected from the group consisting of an unsubstituted purin-9-yl group, an unsubstituted 2-oxo-pyrimidin-1-yl group and a purin-9-yl group substituted with at least one substituent α, said substituent α being selected from the group consisting of an unprotected hydroxyl group, a protected hydroxyl group, an alkoxy group having from 1 to 4 carbon atoms, an unprotected mercapto group, a protected mercapto group, an alkylthio group having from 1 to 4 carbon atoms, an unprotected amino group, a protected amino group, an amino group substituted by an alkyl group having from 1 to 4 carbon atoms, an alkyl group having from 1 to 4 carbon atoms, and a halogen atom; or a pharmacologically acceptable salt thereof.