[ESR spectra of DNA in the temperature range of 8-300 K]

ESR spectra of DNA from different sources were studied in a wide temperature range. In has been shown that the structures like spin-glass exist in DNA samples and these structures manifest an ESR signal at g approximately 2.2 at room temperature, but after cooling in the magnetic field above 0.4 T they give the ESR signal at g approximately 3.0.