The GC percent track shows the percentage of G (guanine) and C (cytosine) bases in 5-base windows on the 31 Jul 2025 Larus michahellis/GCA_964199755.2_bLarMic1.hap1.2/GCA_964199755.2 genome assembly. High GC content is typically associated with gene-rich areas. The average overall GC percent for the entire assembly is % 45.07.
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.
This track is generated on-the-fly by the browser as needed up
to a data density of 50,000 bases per pixel display. Greater than that display
density and the display transitions to using the bigWig file:
https://hgdownload.soe.ucsc.edu/hubs/GCA/964/199/755/GCA_964199755.2/bbi/GCA_964199755.2_bLarMic1.hap1.2.gcOnFly.bw
You can extract the data from that file with the
kent command line program: bigWigToWig:
bigWigToWig https://hgdownload.soe.ucsc.edu/hubs/GCA/964/199/755/GCA_964199755.2/bbi/GCA_964199755.2_bLarMic1.hap1.2.gcOnFly.bw stdout \
| gzip -c > GCA_964199755.2.gcOnFly.varStep.gz
That bigWig data was calculated with the hgGcPercent command
with the window size of -win=50000.
To obtain the traditional 5-base window data for this track
use the following kent command line program hgGcPercent:
hgGcPercent -wigOut -doGaps -file=stdout -win=5 -verbose=0 test \
https://hgdownload.soe.ucsc.edu/hubs/GCA/964/199/755/GCA_964199755.2/GCA_964199755.2.2bit \
| gzip -c > GCA_964199755.2.varStep.gz
The data and presentation of this graph were prepared by Hiram Clawson.