the dna is composed of three main classes of dna , as defined by their buoyant density , rho , in cscl : a bulk dna , rho = 1.699 g cm ( -3 ) , and two satellite dnas , rho = 1.685 g cm ( -3 ) and rho = 1.669 g cm ( -3 ) .
C0012854
dna
C0012934
satellite dnas