1.14.99.1 5-hydroxytryptamine stimulates 438389 1.14.99.1 arachidonate - 716959 1.14.99.1 arachidonic acid exogenous, increases hPHS activity 715090 1.14.99.1 benzoquinone stimulates conversion of prostaglandin G1 to H1 438375 1.14.99.1 cysteine stimulates 438389 1.14.99.1 dopamine - 438392 1.14.99.1 dopamine 3,4-dihydroxyphenylethylamine, stimulates 438389 1.14.99.1 ellagic acid at high concentration and in presence of cofactors inhibition, at low concentrations stimulation 438370 1.14.99.1 epinephrine - 438391, 438392 1.14.99.1 epinephrine stimulates conversion of prostaglandin G1 to H1 438375