Did the purification take longer than usual? It may be that there is some
bacterial contamination at some stage in the prep, most likely on a column.
Columns should be stored in at least 10% alcohol, or with azide added, to
ensure no bacterial or fungal growth, but this often does not decontaminate
connecting lines, which can be quite dirty.
Katheryn
This archive was generated by hypermail 2b29 : Fri Aug 18 2000 - 09:07:05 EDT