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This research investigates the expression of alpha 2 and alpha 3 isoforms of the sodium pump in the cardiac conduction system of rats.

The cardiac conduction system in the rat expresses the alpha 2 and alpha 3 isoforms of the Na+,K(+)-ATPase.

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This research investigates the expression of alpha 2 and alpha 3 isoforms of the sodium pump in the cardiac conduction system of rats.
Analyzed heart-cell-specific expression of Na+,K(+)-ATPase isoform genes
Conducted hybridization signal assessments in various conduction-system structures
Compared expression levels in conduction tissues to adjacent working myocytes.
Sinoatrial nodes, bundle branches, and Purkinje strands showed significant signals for alpha 2 and alpha 3 isoforms compared to working myocytes.
Expression levels suggest a specialized role for these isoforms in cardiac conduction.
Findings may help in understanding localizations of membrane channels and receptors in cardiac tissue.

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Gene expression study reveals alpha 2 and alpha 3 isoforms localization in cardiac conduction structures, suggesting functional implications.

Zahler et al. (1992) studied this question.

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Gene expression study reveals alpha 2 and alpha 3 isoforms localization in cardiac conduction structures, suggesting functional implications.