curves of inhibition of rat brain na , k-atpase and k-pnppase by prostaglandin e2 ( pge2 ) showed a sigmoidal shape with nh for pge2 of 1.4 +/- 0.1 and 1.3 +/- 0.1 , respectively .
C0012472
prostaglandin e2
C0033554
pge2