Oligonucleotide derivative, labeling agent and use for labeling agent

摘要

A labeling agent comprising a plurality of nucleotide derivative units represented by Formula (1) below: (where, Z represents a nitrogen atom or CH, Y represents an uncondensed aromatic hydrocarbon group or condensed polycyclic hydrocarbon group, X1 represents O, S or Se, and X2 represents SH (or S−), Se−, a C1-4 alkyl or a morpholino group).