Gel Purification of DNA with Qiaex beads

[Christie Doris Zerylnick]

Steven Chua (sc690763 at mbcr.bcm.tmc.edu) wrote:
: I am in the process of purifying a DNA fragment for injection into mice to
: generate transgenic mice and I am wondering what other methods are available
: to get a clean fragment with good yield that are suitable for injection... 

We have used QIAEX beads also, and have found they don't give great 
yield.  Then, when I tried to transform some DH5a cells with a 
QIAEX-purified fragment (on several different occasions), all the cells 
croaked.  So it might not be the best thing to use for transgenics.  We 
use DEAE paper and find it works quite well up to 3 or 4 kb--the recipe 
is in CPMB or was in BioTechniques.  Good luck!    Chris Zerylnick