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Alignment of various V-type ATPase K subunits/translocating units for determination of the ion specificity in H. elongata. Used are the same sequences as in Murata et al. (2005) which elucidated the Na+-translocating activity in Enterococcus hirae. In contrast, the remaining sequences refer to H+-linked V-type ATPases. Marked are the essential residues for H+- and Na+-binding (Murata et al., 2005). H. elongata shows similarities with both versions.
