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Fig. 1 | Biology Direct

Fig. 1

From: MEGAN-LR: new algorithms allow accurate binning and easy interactive exploration of metagenomic long reads and contigs

Fig. 1

To illustrate the interval-union LCA algorithm, here we show eight hypothetical species A,B,…,H separated into two genera, P and Q, belonging to the same family R. Alignments from the read r to proteins associated with the species are indicated by arrows on the right and cover between 80% (for A) and 20% (for H) of the aligned read. Using arrows, on the left we depict the sets of intervals computed for nodes P,Q,R as the union of the sets of intervals of the children of each node. Nodes R and P each cover 100% of the aligned read. The read r is placed on A as it is the lowest taxonomic node with ≥ 80% coverage. Note that, if A only covered 60% of the aligned read, then the read would be assigned to the higher taxon P (and this would remain the case even if one of the taxa below Q had 60% coverage)

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