The RNA modification database, RNAMDB: 2011 update. - William A. Cantara; Pamela F. Crain; Jef Rozenski; James A. McCloskey; Kimberly A. Harris; Xiaonong Zhang; Franck A. P. Vendeix; Daniele Fabris; Paul F. Agris (Nucleic Acids Res., 2011)