Fig. 2. Sequence analysis of trout Na+/K+-ATPase
-isoforms. (A) N-terminal isoform-specific identity sequence (ns), (B)
central isoform-specific identity sequence (cs), (C) predicted structure of
the Na+/K+-ATPase
-subunit protein showing (f)
transmembrane domains, (g) ATP binding site, and (h) a highly conserved area
found in all P-type ATPases. Asterisks indicate conserved aas among all
isoforms; colons indicate the presence of a conservative aa substitution;
stops indicate a semi-conservative aa substitution. (D,E) Percentage
variability among isoforms was determined by sliding window analysis on the
predicted aa sequence (D) and cDNA sequence (E). Sliding window analysis used
overlapping windows of 50 to assess variability.