## Description

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.

## Credits

The data and presentation of this graph were prepared by Hiram Clawson (hiram@soe.ucsc. edu).