Table 1.
A comparison of hypotheses on the scenario of the origin of translation.
| Hp: No. name [ref.] Author(s) |
Peptides' specificity | tRNAs | mRNAs | rRNAs | aa-tRNA specificity |
|||
|---|---|---|---|---|---|---|---|---|
| Ad. | Or. | Ad. | Or. | Ad. | Or. | |||
| 1. DRT [20,22] Yarus et al. |
+▲ | + | O▲ | - | O▲ | O | O | O▲ |
| 2. GT [28,29] Weiner & Maizels |
O | O | + | - | - | - | - | - |
| 3. CCH [15,30] Szathmary |
O | O | + | + | - | - | - | +▲ |
| 4. TR [53] Gordon; [54] Poole et al. |
O | + | + | - | O | O | + | - |
| 5. [16] Wolf & Koonin | + | + | +▲ | - | O | + | + | O |
| 6. [1] Crick et al. | O | O | - | - | - | O | - | - |
| 7. [55] Knight & Landweber |
O | O | O | O | - | - | - | + |
| 8. [56] Di Giulio | O | O | O | - | - | O | - | - |
| 9. [57] Noller | O | O | - | - | - | O | +▲ | - |
| 10. [50] Brosius | - | O | + | - | O | O | + | - |
| 11. [51] Schimmel & Henderson |
- | O | + | - | O | O | - | - |
| 12. [52] Bernhardt & Tate |
- | O | + | + | O | O | - | - |
| 13. [39] Baranov et al. | - | O | + | - | O | O | - | - |
| 14. [49] Yakhnin | N/A | + | + | - | O | O | + | - |
| ▲ DRT-RP | + | + | + | + | + | + | - | + |
The names of hypotheses: DRT (Direct RNA Templating); GT (Genomic Tag); CCH (Coding Coenzyme Handles); TR (Triplet Replicase); ▲DRT-RP (Direct RNA Template - Replication Parsimony), the present hypothesis; the others were not given a name. For tRNAs, mRNAs and rRNAs, "Ad." means "the direct advantage of their emergence", while "Or." means "the original source of their emergence". In general, "+" means "clearly stated"; "-" means "not stated"; "O" means "implied or stated in an abstract way"; "N/A" means "Not Applicable"; "▲" means "associated with the present hypothesis". See text for detailed explanations.