How long would it take for the E. coli RNA polymerase to synthesize the primary transcript for the E. coli genes encoding the enzymes for lactose metabolism (the 5,300 base pair lac operon)?

• 一般认为大肠杆菌RNA聚合酶合成大肠杆菌编码乳糖代谢酶(5300bp的乳糖操纵子)的基因的第一次转录要多长时间?