PMC:1687185 / 12080-12366
Annnotations
Eq. (1) shows the background frequency of each nucleotide. bj (and bJ) is known as the Laplacian or Bayesian correction and is equal to d * Q0, j where d is some constant usually set to unity. Eq. (2) gives the weight assigned to the type of nucleotide at the kth position of the motif.