The universal Adeno-X adenoviral expression systems contain vectors that lack a promoter and polyA signal in the cloning site

Adeno-X adenoviral system 3 is available in seven formats, including the most advanced tetracycline-inducible expression system, constitutive expression systems with or without fluorescent reporters, and universal systems that allow you to clone and express any entire expression cassette of your choice

Constructing recombinant adenovirus with In-Fusion Cloning technology