The mouse and human genomes are very well finished, and the chromosome sequences are assigned NC accessions. NW and NT_ do not correspond to unplaced genomic scaffolds as they do in many other species, they correspond to patches or variants not (yet?) integrated into a major build release. This information is redundant and should be filtered out in preprocessing. Filtering annotations is simple, but if we don't want redundant sequences to be included in calculations this will require implementing a new filtering mechanism.
The mouse and human genomes are very well finished, and the chromosome sequences are assigned NC accessions. NW and NT_ do not correspond to unplaced genomic scaffolds as they do in many other species, they correspond to patches or variants not (yet?) integrated into a major build release. This information is redundant and should be filtered out in preprocessing. Filtering annotations is simple, but if we don't want redundant sequences to be included in calculations this will require implementing a new filtering mechanism.