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Modular architecture of native BtCDH and phylogenetic analyses. A, BtCDH (GenBankTM accession number AAO78434) contains an N-terminal lipoprotein signal peptide sequence (SP) and a large central region sandwiched by two domains of unknown function (DUF4988 and DUF4955). B, phylogenetic tree showing the distribution of BtCDH homologs in selected species from various environments.
