“…292 Currently, the Southern blot is used for the detection of PCR products and determination of the reaction specificity. 293 ± 295 Nitrocellulose filters 225,292,296,297 and nylon membranes 298,299 (less frequently, p-azidobenzoylcellulose 236 ) or dried gels following fractionation of NA fragments 300 are commonly used for the fixation of the nucleotide material. Sandwich blot is a promising approach to the analysis of NA in non-purified specimens containing proteins, polysaccharides and other components.…”