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Ribbon plots comparing the structures of calsenilin EF3–4 (red) and KChIP1 that contains a fused Kv4.2 N-terminal peptide at its C terminus (Zhou et al. 2004). (Cyan) EF1–2, (yellow) EF3–4, (green) the fused peptide. The long loop in the EF-hands 3 and 4 is not determined for this structure of KChIP1. The structures were superimposed by using 58 pairs of Cα, C′, and N atoms in the EF3 and EF4 domains.
