the 0.2 m hcl extracts gave from metaphase cells radioactivity in the 32 000-39 000-da region suggesting adp-ribosylation of histone h1 with up to 10 residues of adp-ribose and in the 17 000-20 000-da region indicating adp-ribosylation of core histones .
C0025564
metaphase
C0007634
cells