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Table 1 Percentages of the patterns for which the pattern codon usage is not random

From: Dependency of codon usage on protein sequence patterns: a statistical study

Amino acid Number of codons for amino acid Number of valid patterns Number of patterns with non-random codon usage in pattern region Percentages of patterns with non-random codon usage in pattern region
C 2 24 15 %62.5
D 2 43 29 %67.4
E 2 41 25 %61.0
F 2 40 27 %67.5
H 2 33 16 %48.5
K 2 35 21 %60.0
N 2 38 15 %39.5
Q 2 38 22 %57.9
Y 2 37 15 %40.5
I 3 52 48 %92.3
A 4 47 45 %95.7
G 4 54 46 %85.2
P 4 38 34 %89.5
T 4 48 42 %87.5
V 4 56 47 %83.9
L 6 50 49 %98.0
R 6 34 33 %97.1
S 6 40 39 %97.5
  1. We excluded amino acids with exactly one codon. If an amino acid appears 10 times in a pattern region, and each of its codons appears at least once in this region, we consider the pattern as a valid pattern for the amino acid. A pattern with non-random codon usage is a pattern for which the randomness hypothesis with respect to a completely random background is rejected.