DNA methylation profiling Gene specific profiling Whole blood (human)

Get tips on using QIAamp DNA Mini Kit to perform DNA isolation / purification Bacteria - Gram positive Clostridium difficile

Get tips on using PowerSoil® DNA isolation to perform DNA isolation / purification Bacteria - Gram positive Bacillus subtilis

Get tips on using QIAamp DNA Mini Kit to perform DNA isolation / purification Bacteria - Gram negative Salmonella enterica

Get tips on using Apoptotic DNA Ladder Isolation Kit to perform DNA Damage Assay U-87 MG

Get tips on using NucleoBond® RNA/DNA to perform DNA isolation / purification Cells - Primary cells Rat cortical neurons

Get tips on using GeneChip® Human Genome U133 Plus 2.0 Array to perform Microarray Gene expression arrays - Rhesus monkey brain tissue Biotin

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.

Get tips on using FragEL™ DNA Fragmentation Detection Kit, Colorimetric - TdT Enzyme to perform Apoptosis assay cell type - Human endometrial stromal cells

I would like to regulate the expression of a gene and in order to do that, I have purchased specific siRNA. After optimizing my transfection protocol and using electroporation I have achieved a 60-70% reduction of the gene of interest. However, I cannot observe a significant reduction of mRNA expression but only a reduction of protein. What might be the problem? Could the problem be in my cell treatment method?

Flow cytometry is an immunophenotyping technique whereby sing cell suspensions are stained for either cell surface markers or intracellular proteins by fluorescently-labelled antibodies and analyzed with a flow cytometer, where fluorescently-labelled molecules are excited by the laser to emit light at varying wavelengths, which is then detected by the instrument. There are several key criteria which are required to be kept in mind while designing a flow experiment- 1. Antibody titration (optimal dilution of antibodies should be calculated in order to avoid over- or under- saturated signals for proper detection of surface and intracellular markers), 2. Precision (3 or more replicates of the sample should be used per experiment), 3. Specificity (proper isotype controls should be included in the experiment), 4. Day-to-day variability (experiments should be repeated 3 or more times to ensure consistency and avoid variability due to flow cytometer settings), 5. Antibody interaction (Fluorescence minus one or FMO should be used, which is the comparison of signals from panel minus one antibody vs. the full panel), and 6. Antibody stability (fluorescently-labelled antibodies should be stored at 4C).