Library Amplification

[craig.rowlands at csb.ki.se]

I am using the two-hybrid system to search a cDNA library transformed in
DH5a.  My protocol calls for amplifing the library by plating on 100+,
150cm dishes, followed by scraping into 1-2 L of LB and incubating a
further for 2-4 hrs.  I wish to use Qiagen columns to purify  the plasmids.
 Has anyone used these columns to purify a library, and if so, were there
any noticable affects on yeast  transformation?  Also,  what kind of yield
(of plasmid) can I expect from 2 L of amplified DH5a?  Any advice is
welcome.  Thanks in advance.

J. Craig Rowlands Ph.D.
Visiting Scientist
Karolinska Institute
Center for Biotechnology
NOVUM
S-141 57 Huddinge, Sweden

Tel:   +46 8 608 91 47 
Fax:  +46 8 774 55 38
E-mail: craig.rowlands at cbt.ki.se