primers for TA cloning

Simon Dawson mbzspd at
Mon Nov 20 03:35:15 EST 1995

Hi John,
        I have no idea what people are on about re: loss of A residues. We 
have had aliquots of PCR DNA stored for ages, used a lot etc....and they 
still clone into T vectors as well as if they are fresh. I suspect if A (and 
other residues?) are being lost from the ends, there is some exonuclease 
contamination getting in from somewhere. As far as I can see, there is no a 
priori reason why A residues should just 'drop off'.
  No doubt now I've said that, I won't be able to clone any PCR products 
for ages :P



Dr. Simon Dawson       TEL:+44 (0)115 9249924 ex. 44789
Dept. of Biochemistry  FAX:+44 (0)115 9422225
Queens Medical Centre  Email:Simon.Dawson at
Clifton Boulevard
U.K.                   "Back off man, I'm a scientist!" - Bill Murray.

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