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Table 1 Pairwise correlations between measures of response to genome GC content

From: A simple model based on mutation and selection explains trends in codon and amino-acid usage and GC composition within and across genomes

  Amino acids (n = 21) Codons (n = 64)
  Archaea/bacteria Eukaryotes Archaea/bacteria Eukaryotes
  Slope Intercept Slope Intercept Slope Intercept Slope Intercept
Slope - 0.95 - 0.96 - 0.90 - 0.91
Correlation coefficient 0.92 0.96 0.96 0.98 0.90 0.97 0.94 0.94
  1. All pairs of measures are highly correlated. Critical values: for amino acids (n = 21 including stop codons), r of 0.9 corresponds to P = 3 × 10 -8. For codons (n = 64), r of 0.9 corresponds to P = 5 × 10-24. The x intercept is transformed as x' = 1/(50% - x) to minimize the effects of extreme values with large errors: this occurs for codons and amino acids with very flat slopes.