title: [Age related changes in the glycosidases of chick embryo eye tissues].
abstract: Studies have been made on the activity of glycosidases from eye tissues of developing chick embryos and adult hens. The enzymes of carbohydrates metabolism (hyaluronidase, beta-glycosidase and beta-galactosidase) from the sclera, cornea and ciliary body were examined. It was demonstrated that the distribution of glycosidases in different tissues of the eye is not identical. The activity of beta-glycosidase and beta-galactosidase in all the tissues of 14-day embryos is higher than in adult hens; sharp reduction of the activity was observed at the stage of eye opening. The activity of hyaluronidase in the sclera and cornea of chick embryos is maintained at a low level up to the stage of eye opening, being subjected to minor changes.
mesh_terms: D000375:Aging; D000818:Animals; D002642:Chick Embryo; D002645:Chickens / Q000378:metabolism*; D005123:Eye / Q000196:embryology / Q000201:enzymology*; D005696:Galactosidases / Q000378:metabolism; D005959:Glucosidases / Q000378:metabolism; D006026:Glycoside Hydrolases / Q000378:metabolism*; D006821:Hyaluronoglucosaminidase / Q000378:metabolism
chemical_list: D005696:Galactosidases; D005959:Glucosidases; D006026:Glycoside Hydrolases; D006821:Hyaluronoglucosaminidase
vernacular_title: Vozrastnye izmeneniia glikozidaz tkaneĭ glaz kurinykh émbrionov