How plasmid pUC38 overcomes the disadvantage of plasmid pBR322?
This disadvantage has been overcome via the use of plasmid pUC38 which identifies recombinant in a single step, i.e., plating cells onto agar medium containing ampicillin and X-gal (chromogenic substrate for beta-galactosidase enzyme encoded by lac Z).
Other advantage of pUC38 - Higher Copy Number