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Fig. 7 | BMC Bioinformatics

Fig. 7

From: Multi-objective optimization for RNA design with multiple target secondary structures

Fig. 7

An example of positive design operator. Here we consider a two-target design. In this example, a parent sequence, target structures 1 and 2, a selected predicted structure, and a child sequence are denoted by Parent, Target1, Target2, Predict1, Child, respectively. First, the Parent sequence is copied to the Child sequence; Step 1) we scan Predict1 from the left to the right to find a target base pair which is missing in Predict1 (denoted by a red base pair); Step 2) we change the shadowed A in Parent to the shadowed G in Child. Then, to repair the base complementarity, the shadowed U is changed to the shadowed C; Step 3) in addition, since the changed position forms a base pair in Target2, the shadowed A is changed to the shadowed G

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