The fluoresceinated HSA-miR-19b-3p probe has been designed from mature human miR-19b-3p sequence. This HSA-miR-19b-3p identifies miR-19b-3p sequences in formalin-fixed, paraffin-embedded human tissues and freshly prepared frozen tissues by in situ hybridization. This probe does not react with normal human mRNA or nuclear DNA present in tissues.