in addition to the na+ -- k+-atpase , a magnesium-activated adenosine triphosphatase ( mg2+-atpase ) was demonstrated in the folded epithelium , localized mainly in the mitochondria but also at the brush border and in the apical intercellular space , whereas a bicarbonate-stimulated atpase ( hco-3-atpase ) was present only in the mitochondria .
C0001479
na
C0001473
atpase