Abstract
The physicochemical properties of purified high-polymer DNA isolated from calf thymus and sturgeon testis were investigated after its prolonged keeping (for 1.5–2 years) at 0–4°C in 1 M NaCl, as a precipitate under 70% ethanol, and in the freeze-dried state. DNA obtained from these sources can be kept for at least 1.5 years under the conditions tested without appreciable detriment to its degree of polymerization or its secondary structure. DNA from sturgeon testis, with similar initial physicochemical properties to those of thymus DNA, exhibits much greater stability when kept under the same conditions, indicating the strength of its molecular structure.
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Kolobov, A.V., Vainberg, Y.P. Stability of the physicochemical parameters of DNA during prolonged keeping. Bull Exp Biol Med 81, 360–363 (1976). https://doi.org/10.1007/BF00804920
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DOI: https://doi.org/10.1007/BF00804920