title: Further studies on the increased synthesis of norepinephrine during nerve stimulation of guinea-pig vas deferens preparation: effect of tyrosine and 6, 7-dimethyltetrahydropterin.
mesh_terms: D000818:Animals; D002395:Catecholamines / Q000096:biosynthesis; D004298:Dopamine / Q000378:metabolism; D004558:Electric Stimulation; D006168:Guinea Pigs; D008297:Male; D009474:Neurons / Q000378:metabolism; D009638:Norepinephrine / Q000096:biosynthesis* / Q000378:metabolism / Q000494:pharmacology; D011621:Pteridines / Q000494:pharmacology; D014316:Tritium; D014443:Tyrosine / Q000378:metabolism / Q000494:pharmacology*; D014649:Vas Deferens / Q000378:metabolism*
chemical_list: D002395:Catecholamines; D011621:Pteridines; D014316:Tritium; D014443:Tyrosine; D004298:Dopamine; D009638:Norepinephrine