Biopolymers and cell. 1989. Volume 5. № 3. 79 - 82

Yu. S. Babayan

ETHIDIUM BROMIDE BINDING TO POLYRIBOGUANYLIC ACID

Summary

    The binding of ethidium bromide to polyriboguanylic acid has been investigated accor¬ding to the character of changes in absorption spectra. The calculations have shown that the saturation stoichiometry at binding makes up one ethidium bromide molecule per 5 guanine bases with binding constant (5.2±0.8) -104 M~! in the presence of 0.1 M NaCl and at room temperature.