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DNA degradation

Dieter Deforce ddeforce at allserv.rug.ac.be
Tue Sep 27 10:22:20 EST 1994

I'm doing research on human DNA which I extract 
using Chelex . This DNA extract is concerved in a freezer at -20 C . I kept
it for a month and did 6 analyses with it (so it was defrosted and frozen
six times) I always got results after PCR with primers for 5 STR loci except
last time . Could my sample be degraded or should I search for other causes?
 My e-mail adress is Dieter.Deforce at rug.ac.be

many thanx

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