GC Content Calculator

GC Content Calculator from BiologicsCorp's bioinformatics Center

What is GC Content?
GC content is usually calculated as a percentage value and sometimes called G+C ratio or GC-ratio. GC-content percentage is calculated as Count(G + C)/Count(A + T + G + C) * 100.

Why to care about GC Content?
The GC pair is bound by three hydrogen bonds, while AT pairs are bound by two hydrogen bonds. And so,
The GC content affects the stability of DNA.
The GC content affects the secondary structure of mRNA.
The GC content affects the annealing temperature for template DNA in PCR experiments.

Where to apply the GC Content?
The GC Content can be used in
1. primer design for PCR experiments
2. gene design from protein expression
3. mRNA hairpin prediction
and etc.