pge2 bound to membranes could be displaced by some other prostaglandin ( pg ) molecules : pge1 , 16,16-dimethyl-pge2 , pga1 and pgf2 alpha , but not by 6-keto-pgf1 alpha , pgd2 or arachidonic acid .
C0033554
prostaglandin
C0012472
pge2