Table 1 DNA and RNA stacking energies for the first 2 codond letters and the strong-weak codon classification for the 20 amino acids
From: Exceptional error minimization in putative primordial genetic codes
1st/2nd base | Amino acid | RNA stacking [68] | S/W theory [69] | |
|---|---|---|---|---|
GC | Ala | -2.70 | -3.42 | SSS |
GU | Val | -2.04 | -2.24 | SWS |
AC | Thr | -2.04 | -2.24 | WSS |
GG | Gly | -1.97 | -3.26 | SSW |
CC | Pro | -1.97 | -3.26 | SSS |
GA | Asp/Glu | -1.66 | -2.35 | SWW |
UC | Ser | -1.66 | -2.35 | WSS |
CG | Arg | -1.44 | -2.36 | SSW |
CU | Leu | -1.29 | -2.08 | SWS |
AG | Ser/Arg | -1.29 | -2.08 | WSW |
AU | Ile/Met | -1.27 | -1.10 | WWS |
UU | Phe/Leu | -1.04 | -0.93 | WWS |
AA | Asn/Lys | -1.04 | -0.93 | WWW |
CA | His/Gln | -0.78 | -2.11 | SWW |
UG | Cys/Trp | -0.78 | -2.11 | WSW |
UA | Tyr/Stop | -0.12 | -1.33 | WWW |