This vector is essentially the same as the pCMV6-Entry vector, except for the alternative selection marker (GFP replacing Neomycin). GFP can be used to monitor transfection efficiency or as a cell sorting marker.
There is no drug selection marker in this vector for mammalian cells.
The vector itself does not contain additional tag. If the insert is shuttled from pCMV6-Entry via SgfI/AscI and RsrII/MluI, it will express non-tagged protein. If the insert is shuttled from the pCMV6-Entry vector using SgfI/AscI and Pme I, then it will express Myc-DDK tagged protein.