male weanling f344 rats were orally gavaged with aflatoxin b1 ( afb1 ) in daily doses of 200 , 235 , 270 , 300 , and 350 micrograms/kg/day for a total of 10 doses over a 12-day period , and then 1 week after the last dose they were fed diets of varying protein ( casein ) content to compare the contribution of afb1 dose and dietary protein level on the development of presumptive preneoplastic gamma-glutamyltransferase-positive ( ggt+ ) foci in rat liver .
C0007332
casein
C0012177
dietary protein