species of drosophila closely related to d. virilis have rdna spacers that are homologous with those in d. virilis to the extent that hybridization of a cloned spacer segment of d. virilis rdna to various dna is comparable with hybridization to homologous dna , and distributions of restriction enzyme cleavage sites are very similar ( but not identical ) among spacers of the various species .
C0012933
rdna
C0012854
dna