The GC percent track shows the percentage of G (guanine) and C (cytosine) bases in a 5-base windows. High GC content is typically associated with gene-rich areas.
This track was produced by measuring GC percent in 5 bases, then running a 20,000 base smoothing window over that data to indicate the average GC percent in the 20,000 base window, at each 5 base interval. Thus, each 5 base point in the graph represents the average GC percent in the next 20,000 bases.
This track may be configured in a variety of ways to highlight different aspects of the displayed information. Click the Graph configuration help link for an explanation of the configuration options.
The data and presentation of this graph were prepared by Hiram Clawson (hiram@soe.ucsc. edu).