additional studies such as incubation of ( +/- ) -7 beta,8 alpha- [ 3h ] dihydroxy-9 alpha,10 alpha-epoxy-7,8,9,10-tetrahydrobenzo ( a ) pyrene with nuclei resulted in radioactive labeling of histones h1 , h2a , h2b , and h3 and of high-mobility-group proteins hmg1 and hmg2 .
C0007610
nuclei
C0019644
histones h1