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Fig. 6. Comparison of amino acid sequences in domain IV of `typical' calpains from
arthropods and human. Deduced amino acid sequences were aligned using ClustalW
(see Materials and methods). Broken lines indicate gaps for optimizing
alignment. Amino acid residues that are identical or similar in all the
sequences are highlighted in black; gray background indicates identical or
similar amino acids in most of the sequences. Numbers at the right indicate
amino acid positions, numbered from the N-terminus of each protein. Domain IV
is a calmodulin-like domain that contains five EF-hand motifs (boxes with
broken line). Dm-CalpA contains a unique insertion sequence between EF-1 and
EF-2. The putative EF-5 region was the least conserved between the calpain
sequences. Accession numbers are the same as those given in the legend to
Fig. 5.