This work was supported by the National High Technology 863 Programs of China; the 973 Project of the Ministry of Science and Technology (Grant No. 001CB108901) and the fund of the Shanghai Institutes of Biological Sciences.
In Sinorhizobium meliloti, the nodD3 gene is transcriptionally controlled by two promot-ers, P1 and P2. Under P1, there is a 660 bp sequence including a small open reading frame, ORF2, followed by the nodD3 coding reg...