U2 snRNA
“A conserved pseudouridine modification in eukaryotic U2 snRNA induces a change in branch-site architecture”. RNA 7 (6): 833–45. (June 2001). doi:10.1017/S1355838201002308. PMC 1370140. PMID 11424937. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1370140/.
“Crystal structure of a model branchpoint-U2 snRNA duplex containing bulged adenosines”. RNA 7 (5): 682–91. (May 2001). doi:10.1017/S1355838201002187. PMC 1370120. PMID 11350032. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1370120/.