Example 11
Serum stability of DsiRNA agents is assessed via incubation of DsiRNA agents in 50% fetal bovine serum for various periods of time (up to 24 h) at 37° C. Serum is extracted and the nucleic acids are separated on a 20% non-denaturing PAGE and can be visualized with Gelstar stain. Relative levels of protection from nuclease degradation are assessed for DsiRNAs (optionally with and without modifications).