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![Pronounciation of
guanine](https://webarchive.library.unt.edu/web/20080916022438im_/http://genome.gov/Images/Glossary/Pronounciation/guanine.gif)
defined: |
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One of the four bases in DNA that make up the letters ATGC, guanine is the "G". The others are adenine, cytosine, and thymine. Guanine always pairs with cytosine.
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explained: |
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Listen to a detailed explanation.
Dr. Robert Nussbaum, formerly of the National Human Genome Research Institute's Laboratory of Genetic Disease Research, defines guanine.
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illustrated: |
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View illustration
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related terms: |
![](https://webarchive.library.unt.edu/web/20080916022438im_/http://genome.gov/Images/spacer2.gif) |
base pair,
cytosine,
deoxyribonucleic acid (DNA),
ribonucleic acid (RNA),
protein,
genetic code (ATGC),
nucleotide,
uracil |
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