In article <e-anderson-2211951413240001 at e-mac-56.ski.mskcc.org>,
e-anderson at ski.mskcc.org (Eric C. Anderson) wrote:
> In article <Pine.A18.104.22.1681122111948.48216A-100000 at umabnet.ab.umd.edu>,
> "Mary P. Remington" <mremingt at umabnet.ab.umd.edu> wrote:
>> > Is there an agarose type gel on the market that will separate ~20 base
> > pair differences in a PCR product? Any help or avenues to explore will
> > be appreciated. Thanks, Mary
>> FMC makes an agarose called MetaPhor(tm) which they claim is almost as
> good as PAGE for separating closely spaced products. i've never looked
> into the price but i'm sure that it's a little expensive.
Metaphor agarose works very well to resolve small differences in size.
For DNA 100-500 bp, 2% is reliably achieved, meaning your 20 bp
polymorphism should be easily visualized (if total <1 kbp). A 1:1 mixture
(or higher) of FMC NuSieve:ordinary high quality agarose (eg FMC GTG) will
resolve a 20 bp difference if the total size is <500 bp (tl.
agarose=1.5%/TBE). Metaphor is somewhat expensive*, which more apparent
when making the 2-4% gels needed. This is offset somewhat by reusing the
gels, which I have done up to four times.
*'95 catalog lists 100g/$203 for Metaphor.
Terrence P. Delaney Department of Plant Pathology
Cornell University (607) 255-7856
334 Plant Science Building FAX (607) 255-4471
Ithaca, NY 14853-4203 tpd4 at cornell.eduhttp://ppathw3.cals.cornell.edu/ppath/Delaney/Delaney.html