Assembly Track Settings
Assembly from Fragments   (All Mapping and Sequencing tracks)

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Data last updated at UCSC: 2006-07-10


This track shows the draft assembly of the D. melanogaster genome. Whole-genome shotgun reads were assembled into contigs. When possible, contigs were grouped into scaffolds (also known as "supercontigs"). The order, orientation and gap sizes between contigs within a scaffold are based on paired-end read evidence.

Locations of contigs and scaffolds were deduced from runs of Ns in the assembled sequence. A run of Ns of more than 50000 bases was assumed to be a gap between scaffolds, and a run of Ns between 20 and 50000 was assumed to be a gap between contigs.

In dense mode, this track depicts the contigs that make up the currently viewed scaffold. Contig boundaries are distinguished by the use of alternating gold and brown coloration. Where gaps exist between contigs, spaces are shown between the gold and brown blocks. The relative order and orientation of the contigs within a scaffold is always known; therefore, a line is drawn in the graphical display to bridge the blocks.

All components within this track are of fragment type "D": Draft.