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[Optimization of DNA blot hybridization conditions for various types of membranes].

A set of experiments has been conducted to choose the optimal conditions for DNA transfer and fixation on two types of the nitrocellulose, three types of nylon membranes and on capron filters. The buffer capillary transfer systems, electroblotting and gel hybridization are analyzed. Two techniques for DNA binding have been tested under different transfer conditions for all the membrane types: a vacuum fixation at 80 degrees C and a UV-exposure. The results indicate the critical dependence of the efficiency of blot-hybridization on the conditions of UV-treatment. The UV-exposure longer or shorter than the optimal one resulted in a loss of the hybridization efficiency. The optimal DNA-transfer and fixation conditions are recommended for all the membranes tested. The dependence of the optimal transfer and binding conditions on the specific characteristics of different membrane types was demonstrated for maximal sensitivity of the blot-hybridization.

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