PCT and conditional sequence logo at position 19.

The structure of this figure is identical to that of Figure 7. Here, we observe more contexts representing a considerable amount of realizations, since only three context (III, VI, VII) represent so few sequences that they can be neglected. Among the other eight contexts, we observe two main types: If the predecessing nucleotide (at position 18) is a C (context II–VII), there is a high probability of observing an A at position 19. If the predecessor is a T (context IX–XI), there is a high probabibility of observing a G. The differences among context within those two main types are smaller, yet not negligible, since they further refine the conditional probability distribution. One example are contexts IX and X, which differ in the nucleotide at the second and fourth predecessor. Context IX yields an A as second most probable nucleotide for position 19, whereas context X yields a C.