(thing) by BioTech Wed May 29 2002 at 19:38:37

A site on DNA where a base is missing, in this case a purine (either adenine or guanine), but the phosphodiester backbone of the DNA is still intact. Compare with apyrimidinic site.

From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.

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