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(A+T)/(G+C) ratio
 
Definition:
Biology Glossary search by EverythingBio.com
 
     
  A reference to the base composition of double-stranded DNA. DNA from different sources has different ratios of the A-to-T and G-to-C base pairs, e.g. DNAs isolated from organisms that live in hot springs have a higher GC content, which takes advantage of the increased thermal stability of the GC base pair. (see also Chargaff's rule)  
     


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