after in vitro labelling of isolated rat liver nuclei , the following adp-ribosylated and unmodified histones were identified by hplc and gel electrophoresis : histone h1 ( 0 ) , four histone h1 subfractions , histone h2a.1 , histone h2a.2 , oxidized histone h2a.2 , histone h2a.x , histone h2a.z , histone h2b , three histone h3 variants and histone h4 .
C0007610
nuclei
C0019647
histone h3