EU546821 7621 1 804 URA3 EU546821 7621 1198 1231 loxP site EU546821 7621 1261 1570 oriV derived from pRO1600 EU546821 7621 1647 2480 rep EU546821 7621 2931 3317 lacZalpha EU546821 7621 3595 4524 araC EU546821 7621 4856 5456 ColE1 high copy variant EU546821 7621 5720 6253 aacC1 EU546821 7621 6625 7141 CEN6/ARSH4 derived from Saccharomyces cerevisiae