Suppose you transformed E. coli cells with the pGLO plasmid, but you ran out of arabinose in your lab. This means that you won't be able to "turn on" the glowing green in order to tell which (if any) bacterial colonies on your plate were successfully transformed. Instead, you decide to use PCR and gel electrophoresis to determine whether the cells were successfully transformed with the pGLO plasmid. What gene(s) could you amplify with PCR, then run through gel electrophoresis, in order to determine whether the cells contain pGLO or not?