Fig. 4. Association of the H⁺/K⁺ ATPase ß-subunit and the SR Ca²⁺ ATPase. The oocytes were injected with cRNAs and radiolabeled as described in Fig. 1, except that antisera to the ß-subunit of the H⁺/K⁺ ATPase was used instead of that of the Na⁺/K⁺ ATPase.

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