This track shows the UCSC assembly of the human genome. This assembly merges contigs from overlapping draft and finished clones into longer sequence contigs. The sequence contigs are ordered and oriented when possible by mRNA, EST, paired plasmid reads (from the SNP Consortium) and BAC end sequence pairs.

In dense mode this track depicts in alternating gold and brown the path through the draft and finished clones (aka the golden path) used to create the assembled sequence. Where there are gaps in the path there are spaces between the gold and brown blocks. If the relative order and orientation of the contigs between the two blocks is known a line is drawn to bridge the blocks.