Conserved amino acid region in type B carboxylesterases. The amino acid sequences of representative carboxylesterases were aligned with the Pileup program: Deinococcus radiodurans, GenBank accession no. AAF12163 and AAF09993; Delftia acidovorans, BAA76305; Streptomyces coelicolor, CAB55678 and CAA22794; Bacillus sp. strains BP-23 and BP-7, CAB42083 and CAB93516, respectively; Mycobacterium tuberculosis, CAA17259; Arthrobacter oxydans, AAA22078; Myzus persicae, CAA52649; Caenorhabditis elegans, CAB03277. Amino acid numbering refers to the D. radiodurans 1 sequence.