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  • Title: [Nature of conformational restrictions in nuclear superhelical DNA from thymus lymphocytes].
    Author: Soldatenkov VA, Filippovich IV, Romantsev EF.
    Journal: Biokhimiia; 1983 Jun; 48(6):883-9. PubMed ID: 6192850.
    Abstract:
    The lymphocyte nucleoids of mouse thymus contain about 40% of rapidly labelled nuclear RNA, about 9% of total intracellular protein and all nuclear DNA. Relaxation of superhelical DNA after thymocyte nucleoids treatment with pronase or RNAase suggests that non-histone proteins and/or RNAs are involved in conformational restrictions in the superhelical domains of cell DNAs. Thymocyte nucleoids proteins are represented by two groups of nonhistone proteins with molecular weights of 50 000-60 000 and 75 000-85 000. An essential role in the appearance of conformational restrictions in thymocyte superhelical DNA belongs to disulfide bonds.
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