Positive Control RNA CISH (Dako Omnis) intended for the evaluation of RNA quality by chromogenic in situ hybridization (CISH) on Dako Omnis and is recommended to be used on formalin-fixed, paraffin-embedded (FFPE) tissue specimens.Positive Control RNA CISH (Dako Omnis) is an oligonucleotide-based probe that binds to the 28S ribosomal RNA. The probe is conjugated with fluorescein isothiocyanate (FITC) to enable detection using the Anti-FITC-AP CISH Accessory Kit (Dako Omnis) (K589911-2). When used along with this kit, cells will have a uniform dark blue/purple staining.