Alignment of CPBAs1 with 10 CPB enzymes of other organisms. The residues that are involved in zinc and substrate binding are shown in boxes. The GenBank nucleotide sequence accession numbers of the aligned sequences are as follows: carboxypeptidase B of Anopheles stephensi, ADD31639.1; carboxypeptidase B precursor of Anopheles gambiae, AAS99341.1; carboxypeptidase B preproprotein of Homo sapiens, NP_001862; carboxypeptidase B2 of Homo sapiens, AAT97987.1; carboxypeptidase B precursor of Rattus norvegicus, NP_036665.1; carboxypeptidase B precursor of Sus scrofa (porcine), P09955.5; carboxypeptidase B of Aedes aegypti, AAT36734.1; carboxypeptidase B of Aedes aegypti, AAT36733.1; carboxypeptidase B of Aedes polynesiensis, AAT36736.1; zinc carboxypeptidase of Glossina morsitans morsitans, ADD19124.1; Drosophila sechellia, XP_002035702.1; carboxypeptidase B of Culex quinquefasciatus, XP_001856154.1; carboxypeptidase of Eupolyphaga sinensis, AEI58636.1.