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.
Selected apurinic site links:
© 1997-2006 Healthboard.com.
Healthboard.com is a purely
informational website, and should not be used as a substitute
for professional legal, medical or technical advice.