twelve of twenty-four such clones contained 2micro dna.-i conclude that : ( 1 ) the different types of 2micro dna identified in these strains do not restrict one another , ( 2 ) the different types are inherited extrachromosomally , ( 3 ) lack of 2micro dna in two strains is not due to the absence of genes needed for maintenance and ( 4 ) the approximately 100 copies of 2micro dna contained within a single cell are probably clustered within one or a few cytoplasmic organelles .
C0007634
cell
C1179962
cytoplasmic organelles