[Isoforms of Na+,K+-ATPase catalytic subunit in animal tissues]

The tissue and species distribution of Na+,K(+)-ATPase isoenzymes is considered. Criteria for identification of the above isoforms are presented as attributed to their structural and functional peculiarities. Specificity inherent in functional properties of isoenzymes of Na+,K(+)-ATPase and physiological significance of the latter are discussed.