Besides screening elements, an events-specific flanking sequence that tragets DP-305423-1 was used because all of the genetic elements that were inserted into DP305423-1 are derived from the identical soybean genome [i.e., promoters of the Kunitz Trypsin Inhibitor 3 (P-Kti3) and S-adenosyl-L-methionine synthetase genes (P-SAMS), als gene terminator (T-als), and T-Kti3]. Theoretically, the reported screening methods can be used to track 24 globally commercialized GM soybean events, as shown in Fig.1 and Table 2. However, the method was experimentally verified using 13 CRMs of GM soybean events because of non-availability of rest of CRMs in the laboratory.