DNA & RNA Extraction
Sample preparation – Nucleic Acid Isolation
Nucleic acid isolation is a crucial first step in the molecular biology workflow, whether you are isolating genomic DNA (gDNA) or RNA. Selecting nucleic acid purification products that are optimized to provide maximum yield, purity, and integrity from virtually any sample type and application is important for your research success.
We offer complete solution portfolio for sample extraction and preparation:
• Magnetic beads: 0.5–1.0 μm particles with a paramagnetic core and modified shell (e.g., Applied Biosystems™ MagMAX™ kits and Invitrogen™ Dynabeads™ magnetic beads) Samples are lysed in solution and allowed to bind nucleic acid to magnetic particles based on specific surface modifications. Application of an external magnetic field rapidly collects the particles. Rounds of release, wash, and recapture enable purification of the desired nucleic acid.
• Spin columns: Glass fiber, derivatized silica, or ion exchange membrane in column (e.g., Thermo Scientific™ GeneJET™ and Invitrogen™ PureLink™ kits) Samples are lysed and passed through the membrane using centrifugal or vacuum force. Wash and elution solutions are subsequently passed through the membrane, and the sample is collected into a tube by centrifugation.
• Organic extraction: Phenol-chloroform solution (e.g., Invitrogen™ DNAzol™ and TRIzol™ Reagents) After homogenizing the sample with TRIzol Reagent, chloroform is added, and the mixture separates into a clear upper aqueous layer containing RNA, an interphase layer, and a pink lower organic layer containing the DNA and protein. RNA is precipitated from the upper aqueous layer with isopropanol. DNA is precipitated from the interphase and organic layers with ethanol. Protein is precipitated from the phenol–ethanol supernatant with isopropanol.
KingFisher Automation
KingFisher purification instruments automate the extraction and purification of DNA, RNA, proteins, and cells. KingFisher purification instrument models serve applications ranging from SARS-CoV-2 and infectious diseases, extracting viral or pathogen nucleic acid, to isolating genomic DNA (gDNA) for genetic testing. Their broad functionality and customizable software feature additionally serve applications, such as FFPE and cell-free DNA (cfDNA) tissue and liquid biopsy, immunoprecipitation, peptide mapping, and cells and exosomes.
Dynabeads Magnetic Beads
Dynabeads products center around the goals to provide reliable and reproducible results for the purification and analysis of cells, proteins, exosomes, DNA, RNA, and other molecules. Dynabeads magnetic beads and products deliver highly cited results in the research industry across multiple application areas. Meanwhile, Thermo Fisher Scientific provides exceptional service and support backed by over 30+ years of knowledge and expertise.
What are Dynabeads magnetic beads?
- Dynabeads magnetic beads are superparamagnetic particles—they exhibit magnetic properties when placed in a magnetic field but retain no residual magnetism once removed from the magnetic field
- Unique batch-to-batch reproducibility secures reproducible, quality results
- Spherical shape and defined surface chemistry minimizes chemical agglutination and non-specific binding
- Polymer shell on each bead protects your target from toxic exposure to iron
- Bioreactive molecules can be absorbed or coupled to their surface, and used to separate biological materials (cells, proteins, nucleic acids, etc.)
Dynabeads magnetic beads come in several sizes and different surface functionalities for use in a wide variety of applications. Some beads are precoupled with a biomolecule (ligand). The ligand can be an antibody, protein or antigen, DNA/RNA probe, or any other molecule with an affinity for the desired target.
