Blunt End Concatemerization

Jose de las Heras via (by josenet from
Wed May 14 20:23:41 EST 2008

"Ozan Aygun" <metugenetics from> wrote in message 
news:mailman.90.1210805268.3533.methods from
> Dear all,
> I have annealed two complementary 20nt oligos to give
> a blunt end fragment and would like to concatemerize
> it to give a tandem copies of >15 fragments. I have
> tried Roche T4 ligase without any success with
> standard buffer conditions in a 50ul volume.
> Do you have any alternative suggestions?
> Many thanks,
> Ozan

Are the oligos phosphorylated?
usually you will get dephosphorylated oligos, unless you ask specifically, 
and these won't ligate.


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