Fig. 1From: Congenic rats with higher arylamine N-acetyltransferase 2 activity exhibit greater carcinogen-induced mammary tumor susceptibility independent of carcinogen metabolismExperimental design for chemical-induced tumor experiments. Top shows the dosing of MNU at 3Â weeks of age. The middle displays the dosing of MNU at 8Â weeks of age. The bottom depicts the dosing of DMBA at 8Â weeks of ageBack to article page