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Fig. 8. Phylogenetic relationships of selected calpains from arthropods, nematode
and human. The deduced amino acid sequences of the catalytic (II) and
C2-like (III) domains in land crab (Gl-CalpM, Gl-CalpB and
Gl-CalpT), lobster (Ha-CalpM), fruit fly (Dm-CalpA and Dm-CalpB), nematode
(TRA-3) and human (Capn1, Capn3 and Capn5) calpains were analyzed using
ClustalW and Treeview software (see Materials and methods). The calpains
cluster into four groups: T-type calpains (TRA-3, Gl-CalpT and Capn5),
mammalian `typical' calpains (Capn1 and Capn3), crustacean M-type calpains
(Gl-CalpM and Ha-CalpM) and arthropod A/B-type calpains (Gl-CalpB, Dm-CalpA
and Dm-CalpB).