Cloning 12-15kb DNA

[gritsun at molbiol.ox.ac.uk]

Dear all

I am working with a 12-15kb DNA molecule which has not been stable in vectors 
pGEM3, pGEM4 and pBR322. I'd be grateful for any suggestions for a suitable
vector.

Thanks in advance

Tamara Gritsun
Institute of Virology
Oxford Uk