Fig 2.

Physical map of 4 of the 12 identified NaCl-responsive Tn5luxAB-tagged loci, which may form one continuous operon. (A) Large arrows indicate an identified open reading frame (ORF); the smb numbers designate the Sinorhizobium meliloti SymB ORF reference numbers. The insertion sites of the Tn5luxAB in the respective strains are indicated. Locations are approximate, but sizes are to scale. Smb20476 to Smb20479 are involved in ABC transport of dipeptides. Smb20476 is a putative periplasmic dipeptide binding protein, Smb20477 a putative permease, Smb20478 the putative ATP binding protein of the permease, Smb20479 a putative ATP binding protein, Smb20480 a putative transcriptional regulator, presumable cis-acting, Smb20481 asparagin synthase, and Smb20482 a hypothetical protein. (B) Domain structure of AsnO and Ngg. Only domains with the highest BLAST scores are given. Abbreviations for the different domains are as follows: Gn_At_II for glutamine aminotransferase, Asn_Synthase_B_C for asparagine synthase, NAT_SF for A-acetyltransferase, cya_phycin_syn for cyanophycin synthase, and DdlA for dAla-dAla ligase.