title: Fluctuations in DNA synthesis by mammary tissue from the pregnant hamster, rat and three strains of mice.
abstract: 1. DNA synthesis was determined at midnight and noon in mammary tissue from 13-day pregnant mice (C3H, C57B110 and BALB/c) and 14-day pregnant golden hamsters and Sprague-Dawley rats. 2. Mammary tissue from the hamster and the three mouse strains had elevated DNA synthesis at midnight compared with noon. 3. In contrast, DNA synthesis in mammary tissue from the rat was not different at these two time periods.
mesh_terms: D000818:Animals; D002940:Circadian Rhythm; D006224:Cricetinae; D004247:DNA / Q000096:biosynthesis*; D005260:Female; D008321:Mammary Glands, Animal / Q000378:metabolism*; D008647:Mesocricetus; D051379:Mice; D008807:Mice, Inbred BALB C; D008809:Mice, Inbred C3H; D011247:Pregnancy; D011270:Pregnancy, Animal; D051381:Rats; D011919:Rats, Inbred Strains; D013045:Species Specificity
chemical_list: D004247:DNA