using `` '' fluorescence plus giemsa '' '' technique , sister chromatid exchanges ( sce ) were determined on second-division metaphases in rat liver epithelial cell lines treated with 2-acetylaminofluorene ( 2-aaf ) , the procarcinogen , and n-acetoxy-2-aaf ( n-oac-2aaf ) , an ultimate carcinogen analog .
C0000248
( 2-a
C0001011
n-acetoxy-2-a