Tetracycline Response Element - minimal CMV promoter - PolyA tail
Picture of gel electrophoresis: TRE-CMV and PolyA in pSB1C3 result a 512 bp long insert while the length of TRE-CMV insert is 321 bp.
Picture of gel electrophoresis: TRE-CMV and PolyA in pSB1A3 result a 512 bp long insert forming a plasmid which can be a negative control of the expression vector built up form standard BioBrick parts.