when the nuclei of p. eremicus cells containing radioactively labeled dna in heterochromatin were digested with micrococcal nuclease and the resultant nucleosomal dna was separated by gel electrophoresis , it was found that the repeat length of nucleosomal dna in the heterochromatin dna is not different from that of the bulk of the genomic dna .
C0007610
nuclei of
C0019397
heterochromatin