Nucleotide frequencies and relative information. (a) Nucleotide frequencies are graphed for excluding 22 (5%) of these sequences with relative individual information scores below 3.71 bits. (b) Relative information graph for the same set of cDNAs. Note the relative information at nucleotide position −3 where C and U are depressed, and A is elevated. (c) The positional logo for positions −4 to 6 is illustrated. Figure 9 shows the corresponding weight matrix.