thanks to all who have provided me with the following vendors for biotin-tagged dNTP's...this forum is very helpful... --anton > I believe Life Technologies, aka Gibco/BRL, does. > I used the ones from Roche while in grad school (they were BM then), but > they worked great for what you are doing. I routinly put biotin-dUTP inot a > Eco RI site with Klenow.