hybridization analysis of dna from sensitive and resistant strains has shown that a sequence from pm42 , analogous to a sequence from pmh1 , was integrated at a specific locus in the chromosome of the erythromycin-resistant cells , i.e. , of the transformed r8a2 cells and of the spontaneous mutant m4 er-1 strain .
C1708726
locus
C0008633
chromosome