title: [Seasonal variation of arylesterase activity and its consequence for enzymatic hydrolysis of phenylacetate].
abstract: Studies on red cell arylesterase activity were performed for two years by  potentiometric titration using phenylacetate as substrate. From April to October enzymes had higher arylesterase activity than the rest of the year. During that period an increase of arylesterase activity by L-phyenyl-alanine had not been shown.
mesh_terms: D000818:Animals; D002265:Carboxylic Ester Hydrolases / Q000378:metabolism*; D004912:Erythrocytes / Q000187:drug effects / Q000201:enzymology* / Q000378:metabolism; D006168:Guinea Pigs; D006801:Humans; D010507:Periodicity; D010648:Phenylacetates / Q000378:metabolism*; D010649:Phenylalanine / Q000494:pharmacology; D012621:Seasons
chemical_list: D010648:Phenylacetates; D010649:Phenylalanine; D002265:Carboxylic Ester Hydrolases
vernacular_title: Variation saisonnière de l'activité arylestérasique et ses conséquences sur l'hydrolyse ensymatique de l'acétate de phényle