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After the initial characterization, it is possible to purify further some or all of the plasmid DNAs by RNase digestion and extraction with organic solvents. This further purified DNA is suitable for techniques such as DNA sequencing, subcloning or the production of gene probes. In order to purify plasmid DNA after the isolation process, any …

You can extract nucleic acids, such as DNA, from bone samples in order to analyze gene expressions, to look for somatic mutations of tumors or other pathological tissue, or for genotyping archive material when other sources of DNA are not available. You can use several kits that have already provided by biotech companies. But, if …

Column liquid chromatography has been employed for the separation, purification, and detection of nucleic acids. Among chromatography methods provided, anion-exchange chromatography has been most commonly employed for the isolation and purification of not only oligonucleotides but also large double-stranded DNA.

Some polymerase chain reaction (PCR) applications such as gene detection or typing, require little purified DNA and may be performed with crude bacterial extract. Many methods have been described for this procedure and some of them are straightforward and consist simply boiling bacterial cells in water. At this chance, we want to share the extraction …

In order to measure DNA content you can use UV Spectrophotometer with the advantages are nondestructive and allows the sample to be recovered for further analysis or manipulation. Spectrophotometry uses the fact that there is a relationship between the absorption of ultraviolet light by DNA/RNA and its concentration in a sample. In this particular posting, …

After amplify DNA template using PCR method, now you can continue your work by using gel electrophoresis in a gel composed of agarose in order to separate DNA fragments based on its molecular weight. The percentage of agarose used depends on the size of fragments to be resolved. In general a 0.8-1% gel may be …

After it is extracted from particular sources, nucleic acid must be stored either for archival purposes or before assay performance. The principle of nucleic acid storage is prevention of enzymatic or physical damage to the purified product. In order to overcome those problems we have three options of method to store our purified nucleic acid: …