ECL for colony hybridization

Rinkei Ko ez034381 at
Fri Oct 21 16:51:23 EST 1994

I routinly use ECL non-radioactive DNA labeling system (Amersham) for 
Southern. Recently, I used same system for colony hybridization in order to 
clone a gene of interest. Instead of getting specific signals for the colony 
which has right plasmid, I got signals on all the colonies (False-positive).
I wonder if this system is not suitable for colony hybridization because of
non-specific protein-protein interaction, or washing condition was not 
stringent enough to avoid non-specific bindings. Anyone who are familier with 
this system, please give me some comments and suggestion. Thank you.

Rinkei Ko: rko at

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