The pTARGET™ Vector also contains the simian virus
40 (SV40) enhancer and early promoter region upstream of the neomycin phosphotransferase
gene. The SV40 early promoter contains the SV40 origin of replication,
which will induce transient, episomal replication of the pTARGET™ Vector
in cells expressing the SV40 large T antigen such as COS-1 or COS-7 cells (