AS events generating a bubble in the DBG. All these events create a bubble in the DBG or cDBG, in which the shorter path is composed by k-mers covering the ab junction. This path, composed by k - 1 nodes in the DBG, is compressed into a sequence of length 2k - 2 in the cDBG (Figure 1.b).
Sacomoto et al. BMC Bioinformatics 2012 13(Suppl 6):S5 doi:10.1186/1471-2105-13-S6-S5