gc content calculator - SERP Analysis

https://www.sciencebuddies.org/science-fair-projects/references/genomics-g-c-content-calculator

https://en.vectorbuilder.com/tool/gc-content-calculator.html

https://jamiemcgowan.ie/bioinf/gc_content.html

https://www.biologicscorp.com/tools/GCContent/

https://mcb.berkeley.edu/labs/krantz/tools/oligocalc.html

https://www.novoprolabs.com/tools/gc-content

https://calculatorlib.com/gc-content-calculator

https://punnettsquare.org/gccontent/

https://jamiemcgowan.ie/bioinf/gc_content_plot.html

https://stephenturner.github.io/webtools/gc-gemma3.html