separation ss from annealed ds-oligos

Scott B. Mulrooney ef075 at cleveland.Freenet.Edu
Thu Nov 10 23:31:37 EST 1994

 I'm not sure if this will work in your case, but here it
is: I have used nitrocellulose to remove ss DNA from pre-
parations of ds replicative form phage DNA. This involved
making the dna solution 0.5 M in NaCl and then running it
through a short column of ground nitrocellulose. I have also
used nitrocellulose centrifugal filters for this - simply
filter the mixed ss and ds DNA solution through the filter.
It must be pure nitrocellulose, not a mixture or cellulose
acetate. However, I DON'T know it this method will work for
such small fragments. The original method is in Biochem.
Biophys. Acta (1967) p. 626-627.
Hope this helps.

scott.mulroonye at
Scott Mulrooney
Department of Biological Chemistry
University of Michigan
Ann Arbor, MI 48109-0606

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