Position Weight Matrix, Gibbs Sampler, and the Associated Significance Tests in Motif Characterization and Prediction

<table>PWMS from random sequences follows approximately the normal distribution, based on 1000 random sequences of length 17 drawn from the pool of nucleotides with frequencies of A, C, G, and T equal to 0.3279, 0.1915, 0.2043, and 0.2763, respectively. The distribution has mean equal to 0.068884 and standard deviation equal to 0.314714254. </table>

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Figure 3

Figure 3: Position Weight Matrix, Gibbs Sampler, and the Associated Significance Tests in Motif Characterization and Prediction 