This track shows the number of genomes aligned to each position of the reference. The values range from 0 to the total number of input genomes and imputed ancestral genomes.
Alignability was generated using the halAlignability script of the HAL tools package.
Hickey et al.. HAL: a hierarchical format for storing and analyzing multiple genome alignments.. Bioinformatics. 2013 May;29(10):1341-1342.