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Table 1 Position Count Matrix.

From: Refining motifs by improving information content scores using neighborhood profile search

j k = 0 k = 1 k = 2 k = 3 k = 4 ... k = l
A C 0,1 C 1,1 C 2,1 C 3,1 C 4,1 ... C l,1
T C 0,2 C 1,2 C 2,2 C 3,2 C 4,2 ... C l,2
G C 0,3 C 1,3 C 2,3 C 3,3 C 4,3 ... Cl,3
C C 0,4 C 1,4 C 2,4 C 3,4 C 4,4 ... C l,4
  1. A count of nucleotides A,T,G,C at each position K = 1..l in all the sequences of the data set. K = 0 denotes the background count.