Problems with Promega Taq
nash at biologysx.lan.nrc.ca
Thu Jun 3 15:35:49 EST 1993
In article <Miao-030693075250 at fp1-molbio-13.uoregon.edu> Miao at oregon.uoregon.edu (Vivian Miao) writes:
>From: Miao at oregon.uoregon.edu (Vivian Miao)
>Subject: Re: Problems with Promega Taq
>Date: 3 Jun 1993 15:12:28 GMT
>By the way .....
>I've tried side by side tests with NEB's Vent (neither Deep nor
>Exo-) and it seems that for my setup, Taq makes a lot more
>product than Vent. Before I elicit a host of questions from
>Andre :-) .... the reactions are made up as a cocktail minus
>enzyme and its conc'd buffer stock which are added later, the
>same no. of units of enzyme are used, and reactions were run
>at the same time in the thermocycler; I ran similar volumes of
>the reactions on a gel and by inspection estimate that the product
>band from Taq is probably 3-4X brighter than that from Vent. Is
>this within the range of variation, or is there something about
>error correction by Vent that has a cost in yield? I'm not knocking
> Vent (for some applications, like templates that require very high
> temperature denaturation, Vent is the only thing we've tried that
> works), but it seems that for routine work, (e.g. at 92-94C
>denaturation, 45-55C annealing, 72C extension, 25-28 cycles)
>you get more product with Taq. Comments?
In my hands, it's primer:template specific... Many of my PCRs make a similar
amount of product whether it's Vent or Taq... a couple work better with
Vent, and I have one combination which WON'T amplify with Vent, and I have
the clone of the Taq-amplified product in my fridge!
John Nash | Email: Nash at biologysx.lan.nrc.ca.
Institute for Biological Sciences |
National Research Council of Canada | Email to my other NRC accounts
Ottawa, Ontario, Canada. | is usually forwarded here.
*** Disclaimer: All opinions are mine, not NRC's! ***
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