Table 1.
A total of 65.54 kb of the 367-kb mitochondrial genome of A. thaliana was analyzed in cDNA clones for RNA editing
| Sequence features | Sequence analyzed, kb | cDNA clones analyzed | Sequence not analyzed, kb | Editing sites | Always edited sites* | Editing sites per kb |
|---|---|---|---|---|---|---|
| Identified orfs† | 32.046 | 288 | 0 | 441 | 233 | 13.76 |
| rRNAs and tRNAs | 5.522 | 120‡ | 1.450 | 0 | 0 | 0 |
| Other orfs >100 aa | 4.656§ | 46 | 31.269§ | 0 | 0 | 0 |
| Introns | 7.546¶ | 36 | 17.186∥ | 8 | 7 | 1.06 |
| Leader, trailer | 15.770 | 143 | Unknown | 7 | 1 | 0.44 |
*
The always edited sites are those found altered in all cDNA clones analyzed, the number of which may vary between 3 and 20 clones covering an individual site.
†The orf110c and orf240a are included here.
‡This represents the ≈40% of the cDNA clones with multiple inserts, one of which usually is an rRNA sequence.
§About 8 kb of these ORFs are not detectably transcribed when analyzed by Northern blots (not shown).
¶The intronic ORF matR is not included here but is included with the identified orfs.
∥This number includes only the cis-splicing introns.