Table 1.
Interdomain nucleotide signature analysis of SCA clones
| Nucleotide position(s) of signature feature | Signature features of
|
|||
|---|---|---|---|---|
| Eucarya | Bacteria | Archaea | SCA clones | |
| 31 (bulged base) | Absent | Present | Absent | Euc, Arch |
| 33·551 | A·U | A·U | Y·R | Arch |
| 44.1·397 | −·A | −·A | U·A | Arch |
| 47.1 (extra base) | Present | Absent | Present | Euc, Arch |
| 52·359 | G·C | Y·R | G·C | Euc, Arch |
| 53·358 | C·G | A·U | C·G | Euc, Arch |
| 113·314 | C·G | G·C | C·G | Euc, Arch |
| 121 | A | Y | C | Bact, Arch |
| 292·308 | R·U | G·C | G·C | Bact, Arch |
| 307 | Y | Y | G | Arch |
| 335 | A | C | C | Bact, Arch |
| 338 | A | A | G | Arch |
| 339·350 | C·G | C·G | G·Y | Arch |
| 341·348 | U·A | C·G | C·G | Bact, Arch |
| 361 | C | R | C | Euc, Arch |
| 365 | A | U | A | Euc, Arch |
| 367 | U | U | C | Arch |
| 377·386 | Y·R | R·Y | Y·G | Bact |
| 393 | A | A | G | Arch |
Nucleotide signature features of SSU rRNA gene sequences defining the three domains, Eucarya (Euc), Bacteria (Bact), and Archaea (Arch) (32), were compared to relevant positions of the SCA clones. Numbering (nucleotide position) is based on the E. coli SSU rRNA gene sequence. · denotes a base pair. R and Y represent purines and pyrimidines, respectively.