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. 2003 Aug 28;100(19):10806–10811. doi: 10.1073/pnas.1434268100

Fig. 1.

Fig. 1.

Folding of the two Thermotoga introns according to Cech et al. (37). (a) The intron from T. neapolitana NS-E, Tna.bL1931. (b) The intron from T. subterranea SL1, Tsu.bL1926. Sites where polymorphisms were observed among the additional strains that contained an intron similar to Tna.bL1931 are indicated by stars on the structure along with the mutation observed. (Inset) Insertion sites of the two introns relative to part of domain IV of the T. maritima MSB8 23S rRNA, numbered according to the E. coli 23S rRNA. The intron positions in domain IV are found in sequences that form the interface with the 30S ribosome subunit (5).