Abstract
Summary
Within rats lactating 13 to 14 days, non-suckled mammary glands contained significantly more DNA than suckled glands, and this difference increased in a linear manner as the non-suckling interval increased from 0 to 12 hours. It is suggested that increased numbers of leucocytes account for this difference. The presence or absence of milk did not affect RNA content, and it is suggested that the rat mammary gland has the potential to secrete milk proteins at a constant rate up to 12 hours.
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