Figure 2

Alignment of the deduced amino acid sequences of the zebrafish Na⁺/Ca²⁺ exchangers (NCXs). Residues in black and gray regions indicate identical and similar residues between isoforms, respectively. The intracellular helixes (Helix, gray box) and the "GIG" P loops (P loop, open box) of NCX are also indicated. TM1-9, the postulated transmembrane domains.