Abstract
Summary
DNA per 100 g of body weight and total DNA in 6 abdominalinguinal mammary glands one day after weaning did not differ significantly from that of glands on the 21st day of lactation. DNA content decreased significantly 3 days after weaning. On the 21st day of involution mammary DNA per 100 g of body weight was similar to that of glands from sexually mature virgin rats. One day after weaning RNA content decreased 26.2% and on the 21st day of involution it approximated that of glands from sexually mature virgin rats. RNA/DNA ratio was reduced 31.9% one day after weaning and by the 12th day it was lower than that of glands from sexually mature virgin rats.
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