alternative to wedge sequencing gels

[xiaoming yi]

What is this based on? Refference?

Thanks,
In article <4kgd7n$ek6 at mserv1.dl.ac.uk>, mbsmf says...
>
>After pre-running the gel, just before loading the samples, I routinely add 
1/2
>volume of 3M ammonium acetate to the lower buffer reservoir, which also 
dilutes
>the TBE by 1/3. Then run the gel as usual. This closes up the band spacing in
>the bottom 1/3 of the gel.
>
>Stuart
>