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Table 1 Breakdown of amino acid composition. "p" is the conventional p value for the difference between the observations of amino acids among Activators and Random sequences, assuming that the expected variance for the difference is the sum of the Poisson variances for the number of observations. "P" is the probability that the occurrence frequency would have been observed by chance, given the sample size of 20 amino acids (i.e., P = (1 - (1 - p)20)).

From: Transcriptional transactivation by selected short random peptides attached to lexA-GFP fusion proteins

  LexA-GFP/peptide    LexA-peptide   
Amino Acid Random Activators p P Random Activators p P
A 14 38 0.000 0.009 55 52 0.386 1.000
C 9 25 0.003 0.059 25 31 0.211 0.991
D 11 62 0.000 0.000 27 86 0.000 0.000
E 10 46 0.000 0.000 16 31 0.014 0.251
F 10 20 0.034 0.499 23 83 0.000 0.000
G 45 68 0.015 0.265 45 39 0.256 0.997
H 6 9 0.219 0.993 36 32 0.314 0.999
I 5 10 0.098 0.874 38 43 0.289 0.999
K 7 9 0.309 0.999 14 11 0.274 0.998
L 19 47 0.000 0.006 71 124 0.000 0.001
M 7 10 0.233 0.995 14 13 0.424 1.000
N 13 11 0.342 1.000 34 38 0.319 1.000
P 10 23 0.012 0.212 83 79 0.377 1.000
Q 4 11 0.035 0.513 27 28 0.446 1.000
R 21 32 0.065 0.741 67 20 0.000 0.000
S 20 43 0.002 0.037 79 92 0.160 0.969
T 10 23 0.012 0.212 60 54 0.287 0.999
V 21 40 0.007 0.140 42 34 0.179 0.981
W 8 26 0.001 0.020 16 49 0.000 0.000
Y 8 13 0.138 0.948 32 48 0.037 0.528
# Sequences 21 44    71 66   
# Residues 258 566    831 997