Figure 1: Comparison of RNA quality after different types of tissue preservation (Bioanalyzer electrograms). A. RNA isolated from tissue preserved with liquid nitrogen. B. RNA isolated from tissue preserved with RNAlater™. C. RNA isolated from tissue preserved with dry ice. RNA concentrations as well as RNA quality after these 3 preserving compounds were comparable. There are no bands (corresponding to degradation) between the two ribosomal RNA peaks and below them. Mouse tissue was used for analysis. RNeasy Mini kit (Qiagen) was employed for RNA isolation.