Table 4 The contributions of individual amino acids to codon bias in S. purpuratus
Spearman Correlation Coefficient Between sENC-Xa and Codon Bias (Nc′)b
Amino
AcidGroup 0Group 1Group 2Group 3Group 4All
Phe−0.2817*−0.1190*−0.0349−0.1389*−0.0998*−0.2320***
Leu−0.4710***−0.4230***−0.2347***−0.3133***−0.3443***−0.5338***
Ile−0.3479***−0.1645*−0.1145*−0.1926*−0.2276***−0.4752***
Val−0.4540***−0.2901***−0.0887−0.2167***−0.2213***−0.3698***
Ser−0.2738*−0.2942***−0.2220***−0.2015***−0.1740*−0.0881*
Pro−0.1641−0.1617*−0.1618*−0.0553−0.0972*0.0469
Thr−0.4155***−0.2503***−0.2589***−0.1756*−0.2127***−0.1869*
Ala−0.3273***−0.2561***−0.1886***−0.0902−0.1108*−0.0987***
Tyr−0.3532***−0.1159*−0.0639−0.1601*−0.1461*−0.2838***
His−0.1075−0.08840.06890.03270.01870.0528
Gln−0.2788*−0.1790*−0.1207*−0.0667−0.1399*−0.2867***
Asn−0.3426***−0.2335***−0.0085−0.1234*−0.1298*−0.2969***
Lys−0.4319***−0.2315***−0.06010.0016−0.1771***−0.3864***
Asp−0.0306−0.1397*0.02980.00130.01580.0567*
Glu−0.2241*−0.1997***−0.0158−0.0448−0.1125*−0.2452***
Cys−0.0050−0.0663−0.01050.0565−0.03150.0003
Arg−0.3034***−0.1641***−0.3598***−0.1693*−0.2573***−0.0451
Gly−0.1303−0.1055−0.0958−0.0003−0.1383*−0.0213
  • sENC-X, scaled ENC-X; Phe, phenylalanine; Leu, leucine; Ile, ; isoleucine; Val, valine; Ser, serine; Pro, proline; Thr; threonine; Ala, alanine; Tyr, tyrosine; His, histidine; Gln, glutamine; Asn, asparagine; Lys, lysine; Asp, aspartic acid; Glu, glutamine; Cys, cysteine, Arg, arginine; Gly, glycine. *Significance at P < 0.001. ***Significance at P < 10−10

  • a Moriyama and Powell 1997.

  • b Novembre 2002.