This track shows the coverage level of the genome and, in full display mode, the position of each clone that aligns to the genome sequence. For more information on the track display, see the Display Conventions section.
Each clone is assigned one of three coverage levels, which may be viewed in the "Status" field on the details page for the clone:
In dense display mode, this track shows the coverage level of the genome. Finished regions are depicted in black. Draft regions are shown in various shades of gray that correspond to the level of coverage. At high resolution these usually resolve into gaps between clones.
In full display mode, this track shows the position of each clone that aligns to the genome sequence. Where fragments of a clone do not form a continuous alignment, individual fragments are displayed against a gray background and numbered.
Clones from the National Center for Biotechnology Information (NCBI) were aligned to the genome using psLayout. Where a clone record contained unordered fragments, fragments were individually aligned, then clustered about a median value and displayed together if they align with gaps no greater than 60 kb. Some fragments in an original clone record may not be displayed.
This annotation was devised by Jim Kent, with further engineering by Hiram Clawson.