TUNEL assay is the cell death detection method where the biochemical marker of apoptosis is DNA fragmentation. The assay involves the microscopical detection of generated DNA fragments with free 3'-hydroxyl residues. in apoptotic cells using enzyme terminal deoxynucleotidyl transferase (TdT) which adds biotinylated nucleotides at the site of DNA breaks. Major challenges of this method involve proper access of the enzyme which could be hampered by poor permeabilization and/or excessive fixation with cross-linking fixative (common with archival tissue). This issue can be resolved by optimizing the incubation time with Proteinase K or CytoninTM.
Get tips on using PerCP-Cy™5.5 Mouse Anti-Human HLA-DR to perform Flow cytometry Anti-bodies Human - HLA-DR
Get tips on using Purified Mouse Anti-Nucleoporin p62 Clone 53/Nucleoporin p62 to perform Autophagy assay cell type - N27 dopaminergic cells
Get tips on using Monoclonal Mouse Anti-Human Cytokeratin (Concentrate) Clone AE1/AE3 to perform Immunohistochemistry Mouse - Cytokeratin
Get tips on using Purified Rat Anti-Mouse CD24 Clone M1/69 (RUO) to perform Immunohistochemistry Mouse - CD24
Get tips on using Purified Rat Anti-Mouse CD24 Clone M1/69 (RUO) to perform Immunohistochemistry Mouse - CD24
Get tips on using Mouse GFR alpha-3/GDNF R alpha-3 Antibody to perform Immunohistochemistry Mouse - Gfrα3
Get tips on using Human/Mouse/Rat Total HSP70/HSPA1A DuoSet IC ELISA to perform ELISA Mouse - HSP70
RNA-Seq is a method to sequence RNA by applying Next Generation Sequencing (NGS). The quality of RNA is critical for the success of RNA-Seq. The integrity of RNA is measured by the RNA integrity number (RIN). RIN is computed from RNA electrophoresis and electropherogram profiles (the peak area of the 28S rRNA should be approximately twice the peak area of the 18S rRNA). If you get the RIN value lower than 7, the possibility of getting the low quality of RNA-seq data is high. To get a high quality RNA, it is better to work with fresh samples or snap-freeze the tissues in liquid nitrogen as quickly as possible and store them at -80°C until further use. Make sure designated areas and all your filter tips, microfuge tubes, plastic, and glassware are RNase-free.
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.
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