the high molecular weight filter-bound dna samples were sedimented to equilibrium in cscl buoyant density gradients and found to contain primarily mouse satellite dna density sequences ( 1.691 g/cm3 ) with some minor fractions at other density positions ( 1.670 , 1.682 , 1.705 , 1.740 , 1.760 g/cm3 ) similar to those observed by our laboratory in previous investigations of micrococcal nuclease-resistant chromatin ( marx , k.a . ( 1977 ) biochem . biophys . res . commun . 78 , 777-784 ) .
C0012854
dna
C0012934
satellite dna