## Description

This track depicts gaps in the assembly. Gaps are represented as black boxes in this track. If the relative order and orientation of the contigs on either side of the gap is known, it is a bridged gap. In this case, a white line is drawn through the black box representing the gap and the gap is labeled "yes".

This assembly contains the following types of gaps:

- Fragment - gaps between the whole genome shotgun (WGS) contigs of the Arachne assembly, represented by 100 Ns . In this assembly, all fragment gaps are bridged.
- Contig - gaps between the scaffolds ("super-contigs") constructed from the WGS contigs. On the pseudo-chromosomes containing scaffolds that could not be confidently placed on a chromosome (e.g. chrN_random), these gaps are represented by 50,000 Ns, with the exception of chrUn_random, on which the gaps are 10,000 Ns. On all other chromosomes, the gap size is based on the distance between scaffolds when aligned to the finished human genome assembly, as described in the Assembly track description.
- Heterochromatin, Centromere, and Telomere - gaps from large blocks of heterochromatin (size varies).