Figure 1From: TurboFold: Iterative probabilistic estimation of secondary structures for multiple RNA sequencesNucleotide coincidence. Example illustrating nucleotide co-incidence. (a) a sample alignment for two hypothetical sequences x1 and x2, and (b) representation of the alignment as an array where i denotes the nucleotide index for sequence x1 and k the nucleotide index for the sequence x2. The co-incident nucleotide positions are indicated by black and cross-hatched squares, where the black squares indicate aligned positions and the cross-hatched squares indicate inserted positions.Back to article page