The graphic representation of a mixture of Markov models. A graphic representation of a mixture of Markov models. On the top is a motif of length 14 bases. On the left, 6 positions, which are independent of each other and all other positions, form a 0th order Markov chain. In the middle, 3 positions form a linear chain of 1st order Markov model. On the right, the remaining positions that closely depend on each other form a circular chain of the 2nd order Markov model.