EN
The nuclear matrices from White bush (Cucurbita pepovar. patisonina)cell nuclei have been isolated using three methods: I, standard procedure involving extraction of cell nuclei with 2 NaCl and 1% X-100; II, the same with pre-treatment of cell nuclei with 0.5 CuS04 (stabilisation step); and III, method with extraction by lithium diiodosalicylate (LIS), and compared the polypeptide pattern. The isolated matrices specifically bind SAR DNA from human β-interferon gene in the exogenous SAR assay and in the gel mobility shift assay. Using IgG against the 32 endonuclease we have found in the DNA-protein blot assay that this protein is one of the proteins binding SAR DNA. have identified three proteins with molecular mass of 65 , 60 and 32 which are responsible for SAR DNA in the gel mobility shift assay experiments.