DNA methylation profiling Gene specific profiling Human ovarian tissue

Get tips on using ApoBrdU Red DNA Fragmentation Kit to perform TUNEL assay cell type - SKOV3, Caov3 human ovarian cancer

Though DNA quantification is but one small step in the multifaceted DNA sample preparation workflow, it can have large implications on the performance and validity of conclusions drawn from downstream assays. Major challenges include accuracy, precision, reproducibility, and detection of present contamination. Among UV spectrophotometry, fluorescence and real-time PCR based methods, the quantification method should be chosen based on the requirement of the downstream assay.

Get tips on using QIAamp Fast DNA Tissue Kit to perform DNA isolation / purification Tissue - colon

Get tips on using QIAamp DNA FFPE Tissue Kit to perform DNA isolation / purification Tissue - heart

Get tips on using QIAamp DNA FFPE Tissue Kit to perform DNA isolation / purification Tissue - bone

Get tips on using QIAamp DNA FFPE Tissue Kit to perform DNA isolation / purification Tissue - lung

Get tips on using QIAamp DNA FFPE Tissue Kit to perform DNA isolation / purification Tissue - liver

Get tips on using EZ1 DNA Tissue Kit (48) to perform DNA isolation / purification Tissue - FFPE samples

Protein isolation is a technique that involves isolation and/ or purification of protein from cells or tissues via chromatography or electrophoresis. The major challenges in protein isolation include: 1. The concentration of proteins in cells is variable and tends to be small for some intracellular proteins. Unlike nucleic acids, proteins cannot be amplified. 2. Proteins are more unstable than nucleic acids. They are easily denatured under suboptimal temperature, pH or salt concentrations. 3. Finally, no generalized technique/protocol can be applied for protein isolation. Proteins may have different electrostatic (number of positively or negatively charged amino acids) or hydrophobic properties. Therefore, protein purification requires multiple steps depending on their charge (a negatively charged resin/column for positively charged proteins and vice-versa), dissolution (using detergents) and unlike in the case of DNA and RNA, instead of using salts, proteins should be isolated by isoelectric precipitation.

DNA isolation and purification is the first critical step in sample preparation that helps ensure optimal performance of downstream assays like PCR, microarrays, and sequencing. Failure in yielding high-quality DNA would be the major reason that DNA doesn't work for the downstream application. To circumvent this, one should follow the recommended storage conditions to minimize DNA degradation by nucleases and shouldn't overload the purification system.