The GC sample track shows the percentage of bases that are G or C in small regions across the genome. Windows with high GC content are plotted at higher vertical positions than windows with low GC content. High GC content is associated with gene-rich areas.
For each 1,000 base disjoint window, the percentage of G or C bases was calculated and plotted as two points at the start and end of the window. By default, the windows are not connected with horizontal lines. To modify the display to always connect adjacent samples, enter "-1" in the "Maximum Interval to Interpolate Across" text box.
This track was created by Ryan Weber of the UCSC Genome Bioinformatics group.