optimum conditions for a dna synthesizing system based on isolated nuclei have been described ( krokan , h. , bjorklid , e. , and prydz , h. ( 1975 ) , biochemistry , preceding paper in this issue ) [ 3h ] ttp-labeled nascent dna produced during very short pulses was analyzed by centrifugation in alkaline sucrose gradients .
C0007610
nuclei
C0084795
ttp