32p-labeling of phosphatidylinositol in parotid slices was increased by an alpha 1- and alpha 2-agonist ( epinephrine and norepinephrine ) and alpha 1-agonists ( methoxamine and phenylephrine ) , but not by an alpha 2-agonist ( clonidine ) and a beta-agonist ( isoproterenol ) .
C0014563
epinephrine
C0028351
norepinephrine