Activites enzymatiques de la retine et anthocyanosides extraits de vaccinium myrtillus (lactate-deshydrogenase, α-hydroxybutyrate-deshydrogenase, 6-phosphogluconate-deshydrogenase, glucose-6-phosphate-deshydrogenase, α-glycerophosphate-deshydrogenase, 5-nucleotidase, phospho-glucose-isomerase)