how do I get rid of adapters / linkers after ligation to my cDNA

Ralf Sigmund ralf.sigmund at
Sat Nov 6 13:04:20 EST 1999

I am trying to digest ds-cDNA with a four base cutter Restriction Enzyme.
Afterwards I ligate an adapter to both cutted ends.

I now want to PCR-Amplify my cDNA Fragment with Primers in the Adapter

This apperently fail because the PCR is completely dominated by

So I would like to get rid of theese 58 BP Adapter dimers.
However the amount of cDNA is very limited, so I fear to loose too much if I
run an agarose Gel...

Thanx for any hints

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