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Structures of the stx2c genes and flanking regions of phage 2851 and prophage Nil2. The grey shaded area indicates the overlapping sequenced DNA (identity > 99%). The hatched boxes (no. 1 to 6) represent genetic elements of phage 2851 DNA (Table 1). The black boxes (no. 7 to 9) represent PCR products derived from phage 2851 DNA used for diagnostic PCR (Table 1). tR, putative terminators involved in antitermination by Q.
