J. Pat Martinez martinez at
Wed Aug 14 11:05:42 EST 1996

I've used Supercos from Stratagene with good results.  One advantage with
this cosmid is that you don't have to size select your partially digested
DNA.  The design of the vector (2 cos sites) allows the packaging reaction
to select the appropriate sized recombinant.  I've only used this cosmid
vector so I don't know how it compares to other cosmid vectors.

Pat M.

 <Pine.A32.3.93.960813211140.34344A-100000 at>, Stephen J
Billington <sbilling at U.Arizona.EDU> wrote:

> Hi Mol. Biol. Netters
> I am looking to create genomic libraries from 2 or 3 microorganisms. I
> have in the past used lambda derivatives with great success, but my new
> boss is dead keen to use cosmids. His main point is that we can use the
> cosmid directly to complement E. coli mutants. Anyway, not wanting to
> argue with the boss, does anyone out there have any favorite cosmids? My
> major problem with thenm is the hassle with subcloning from such large
> inserts and my few encounters with them in the past have been riddled with
> instability problems. If anyone can help me with this I'd be appreciative,
> the boss wants to use pLFA, but surely there is something a bit more up to
> date and easier to use than that.
> Catch yu
> ------------------------------------------------------------
> Stephen Billington Ph.D.
> Department of Veterinary Science
> University of Arizona
> sbilling at 
> billing at

More information about the Methods mailing list