RNA-SELECTIVE HYBRIDIZATION REAGENT AND UTILIZATION OF THE SAME
Provided is a nucleoside derivative which has a high affinity for RNA. Use is made of a nucleoside derivative represented by either formula (1) or formula (2). (In formulae (1) and (2), Z represents a carbon atom or a nitrogen atom
R 1 represents a hydrogen atom or a hydroxyl-protecting group
and R 2 represents a hydrogen atom or a phosphodiester group).