the responses of human hepatocytes were qualitatively similar to those of rat hepatocytes , but statistically significant differences between the two species in the amounts of dna damage and/or unscheduled dna synthesis were observed with n-nitrosodimethylamine , n-nitrosomorpholine , n-nitrosopiperidine , n-nitrosopyrrolidine , and n-nitroso-n-butylurea .
C0012860
dna damage
C0012899
unscheduled dna