from rat liver nuclei exposed to carcinogenic [ 3h ] - ( +/- ) -7r,8t-dihydroxy-9t,10t-oxy-7,8,9,10-tetrahydrobenzo ( a ) p yrene [ ( 3h ] bpde-i ) or noncarcinogenic [ 3h ] - ( +/- ) -7r,8t-dihydroxy-9c,10c-oxy-7,8,9 , 10-tetrahydrobenzo ( a ) pyrene [ ( 3h ] bpde-ii ) , h1 and core histone fractions were prepared by differential acid extraction .
C0007610
nuclei
C0019652
histone