Phylogenetic tree of BacA-SbmA proteins. The tree was generated using the neighbor-joining algorithm of Saitou and Nei (35) as indicated in Materials and Methods. Branch distances are indicated in parentheses. HsALDP, ALDP of Homo sapiens (accession no. AJ000327); NcALDP, ALDP of Neurospora crassa (accession no. CAB91246); BCG1854c, BacA of Mycobacterium bovis BCG Pasteur (accession no. YP_977945); Rv1819c, BacA of M. tuberculosis H37Rv (accession no. Q50614); Mmar2696, BacA of M. marinum (accession no. MarinoList MMAR_2696); Mul3059, BacA of M. ulcerans (accession no. YP_906777); MAP1531c, BacA of M. avium subsp. paratuberculosis (accession no. NP_960465); Mav2896, BacA of M. avium (accession no. YP_882082); ML2084, BacA of M. leprae (accession no. CAC31039); Mflv3410, BacA of M. gilvum (accession no. YP_001134674); Mvan3164, BacA of M. vanbaalenii (accession no. YP_953972); Msmeg4380, BacA of M. smegmatis (accession no. YP_888655); Nfa7730, BacA of Nocardia farcinica IFM 10152 (accession no. YP_116982); Ro01004, BacA of Rhodococcus sp. strain RHA1 (accession no. YP_700989); AbSbmA, SbmA of Acinetobacter baumannii (accession no. YP_001085804); BaBacA, BacA of Brucella melitensis biovar Abortus (accession no. AAF76873); RmBacA, BacA of Rhizobium meliloti (accession no. CAA51918); EcSbmA, SbmA of Escherichia coli (accession no. CAA38092); SetSbmA, SbmA of Salmonella enterica subsp. enterica serovar Typhi (accession no. NP_454971); AeSbmA, SbmA of Acidovorax avenae subsp. citrulli (accession no. YP_970563); CjSbmA, SbmA of Campylobacter jejuni subsp. jejuni (accession no. NP_281392); DpSbmA, SbmA of Desulfotalea psychrophila (accession no. YP_066699); Ba1484, Ba1484 of B. abortus (accession no. YP_222173); SmExsE, ExsE of S. meliloti (accession no. CAA12533); EcYddA, YddA of E. coli (accession no. P31826).