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Fig. 7 | BMC Evolutionary Biology

Fig. 7

From: Evolutionary origin of type IV classical cadherins in arthropods

Fig. 7

Comparison of the distribution patterns of cysteine residues among classical cadherins. a. Comparative diagram of the distribution patterns of cysteine residue in arthropod and non-arthropod bilaterian classical cadherins. In addition to the 21 classical cadherins shown in Fig. 5, the following seven classical cadherins were used: Gb1-cadherin (Gb1, cricket); Fc1-cadherin (Fc1, springtail); Af1-cadherin (Af1, brine shrimp); Af2-cadherin (Af2, brine shrimp); Ea1-cadherin (Ea1, copepod); Ha1-cadherin (Ha1, amphipod); and Mo-cadherin (Mo, mite). The relative positions of cysteine residues in the classical cadherins are indicated by short vertical bars. The black bar denotes a solitary cysteine residue (−C-), the blue bar denotes two successive cysteine residues (−C-C-), and the red bar denotes two cysteine residues spaced with a single non-cysteine residue (−C-X-C-). The shaded regions indicate that there are no sequences for comparison. b Representation of the six C-terminal-most amino acid residues of the various classical cadherins. The short sequence motif, E-S/A-W-C, is shown in red. c Alignment of the amino acid sequences in parts of the CE1 or CE domains of the various classical cadherins. All cysteine residues are highlighted in red. Parentheses denote the omission of seven non-cysteine residues. The difference between the cysteine patterns of the insect type IVa cadherins and the other cadherins is indicated by “+” characters

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