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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})).

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 |