DNA precipitations

[Edgar Valencia]

Hi David: 
In our experience, depends on what for are you going to use DNA.
If we want to do ligations, we prefer to precipitate with EtOH
alone or with NH4Ac, NaOAC in that order. For other purpouses 
we use NaCl.
I hope this helps 

                          Edgar Valencia Morales
                                  MEXICO
                        e-mail edgar at cifn.unam.mx