Does RNA - PCR ??
sullivan at gwis2.circ.gwu.edu
Sat Jul 22 02:32:12 EST 1995
Duncan Clark (Duncan at genesys.demon.co.uk) wrote:
: In article: <DBxnyo.Gn3 at midway.uchicago.edu> rmoldwin at midway.uchicago.edu writes:
: > I also have seen several reports of RT activity in Taq. Perhaps, it varies
: > according to the manufacturer, and the specific origin of the Taq, e.g.
: > recombinant/modified vs. wild type. In my lab, we very rarely see this RT
: > activity when using standard Perkin Elmer recombinant AmpliTaq, which PE
: > reports in their catalog to have "minimal, low" RT activity. AmpliTaq is
: > modified from the wild-type Taq, but I can't determine what the difference is
: > from their literature.
: AmpliTaq is not modified at the aa level just a recombinant version with
: modified codon usage. It has the same level of RT activity ie low.
: As far as I am aware all thermus polymerases show a level of RT activity, but
: some are better than others ie Tth from Thermus thermophilus HB8. Most have
: an extremely poor level of RT activity.
: On a similar note all thermus pols have the terminal transferase activity ie
: they add a single base to the 5' end of the PCR product which is usually (but
: not always) a T.
A T? I thought it was usually an A.
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