Figure 8

Example for aCMs: Input MSA is split into red and purple sub‐families. Their consensus structures are given as first and last row in A. The individual guide trees for red and purple and their ambivalent guide forest are shown in B. For simplicity, we omit terminal symbols for bases and skip‐nodes – described below – in the trees. That is why subscript 3, pointing to the “insertion”‐column, does not appear in the guide trees. The \(\mathcal {G}_{5}\)‐style CFG of the ambivalent model is shown in C.