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Promoterless Retroviral vector? - (May/28/2004 )

does anyone know of an existing retroviral vector that lacks a promoter? i would like to be able to insert a promoter into the vector without having to worry about the existing promoter driving transcription.
any info would be appreciated,
thanks.
greg

-gjnewton-

try clonetech:
http://www.bdbiosciences.com/clontech/tech.../catretro.shtml
the pQC vectors lack the LTR enhancer repeat region for sure.

-il0postino-