need bidirectional promotor

[mike roper]

In article <DCr08s.6AM at midway.uchicago.edu>, grandall at ellis.uchicago.edu (Glenn Randall) says:
>
>
>I am trying to locate a mammalian expression vector with a bidirectional 
>promoter (i.e. DHFR) flanked by multi cloning sites. If unavailable, a 
>clone with a well characterized mammalian bidirectional promoter will 
>suffice.  If you have any suggestions, I would be grateful.
>Thanks, Glenn
>
>
If a viral one will do, try the sv40(late/early) promoter.