Modified nucleotides of Haloarcula marismortui 23S rRNA and estimates of equivalent nucleotides in E. coli. If the equivalent nucleotide is modified in E. coli it is also listed along with the S. cerevisiae and human equivalent as well.

^a Numbering as in PDB entry 1JJ2. Asterisks indicate the corresponding nucleotides not visible in the crystal structure of the large subunit H. marismortui at 2.4 angstroms (Klein et al., 2001; Ban et al., 2001). Modified nucleotides are indicated according to Kirpekar et al., 2005.

^b Numbering according to Genbank entry J01695, annotated at the Gutell lab Comparative RNA website.

^c Numbering of modifications according to Piekna-Przybylska et al., 2007 (people.biochem.umass.edu/sfournier/fournierlab/snornadb/).

^d Numbering according to U13369, modifications indicated according to Maden, 1990 and Ofengand and Bakin, 1997.