title: Annual changes of beta-N-acetylglucosaminidase activity rhythm in mouse submandibular gland.
abstract: Seasonal effects in daily beta-N-acetylglucosaminidase activity from submandibular gland of adult male mice, born and raised under rigorously controlled laboratory conditions were studied. Every four hours during one 48 h period, groups of 7 mice were killed at monthly intervals. Seasonal differences in circadian activity were found, having their acrophase at different times of the day. An attempt was made to explain the observed changes by changes in hormonal background due to a certain kind of genetic memory pertaining to laboratory animals.
mesh_terms: D000118:Acetylglucosaminidase / Q000378:metabolism*; D000818:Animals; D002940:Circadian Rhythm; D006596:Hexosaminidases / Q000378:metabolism*; D008297:Male; D051379:Mice; D012621:Seasons; D013363:Submandibular Gland / Q000201:enzymology*
chemical_list: D006596:Hexosaminidases; D000118:Acetylglucosaminidase