the erythrocyte plasma membrane ca2+-pumping atpase is known to form an acyl-phosphate catalytic intermediate , but there is otherwise little structural information linking it to the other mammalian ion-pumping atpases which also form phosphorylated intermediates ( the na+ , k+-atpase of plasma membranes , the ca2+-atpase of sarcoplasmic reticulum , and the h+ , k+-atpase of gastric mucosa ) .
C0300252
plasma membrane ca2
C0001473
atpase