after extended periods of incubation at a fixed ionic strength and temperature , however , the profiles of percentage of dna renatured as a function of ethidium concentration become very similar for all the closed circular dnas tested and display a transition from an absence of dye-mediated renaturation to virtually 100 % renaturation upon neutralization over a small range of dye concentration .
C0012854
dna
C0012925
circular dnas