Figure 4
From: A model of evolution with constant selective pressure for regulatory DNA sites
Transitional probabilities P cn , P cc , P nn , P nc , P nm for λ = 1/6, μ= 2. Here we have P cc (u) > P nn (u) for all u > 0, since 3λ ≤ 2μ +1. The consensus is strong and the stationary distribution of the consensus state is π c = 2/3. Since μ > λ, we have P cn (u) <P nm (u). The probability of substitutions between non-consensus nucleotides P nm (u) is not monotone with a maximum point at u2 = 2 log 7/11 ≈ 0.354. Since μ > 1, transitions between non-consensus nucleotides occur more frequently than transitions from a non-consensus to the consensus nucleotide, P nc (u) <P nm (u) on the time interval u ∈ (0, u1), whereas P nc (u) > P nm (u) for u > u1. This figure also shows the relation between P nn (u) and P nc (u).