Protein expression and purification Mammalian cells HeLa

The most widely used method for protein quantification is by spectrophotometry. The concentration of the protein in the samples is measured at an absorbance of 280 nm. The absorbance of the sample protein is then plotted against a standard curve. This method allows for total protein quantification in a sample (cell and tissue extracts). Before analysing the concentration of protein in the sample, it is important to choose the right test method.  For high protein concentration samples (above 5 - 160 mg/ml) the best method is to use the Biuret test. For low concentrations samples (between 1 - 2000µg/ml) the best methods are Lowry assay, BCA assay, Bradford assay and coomassie blue (for exact sensitivity of the test kits you use, refer to manufacturer's protocol). If the samples contain detergents like Triton X-100 then BCA assay is the best choice. For samples that have proteins larger than 3 KDa in size Bradford assay is the best choice. Each method has advantages and disadvantages, plan your analysis considering your sample characteristics.

Get tips on using pFastBac1-A/reassortant/NYMC X-179-NP to perform Protein Expression Eukaryotic cells - S. frugiperda Influenza NP

Get tips on using DNeasy Blood and Tissue Kit (250) to perform DNA isolation / purification Cells - Immortalized cell lines Loucy

Get tips on using FITC Annexin V Apoptosis Detection Kit I to perform Apoptosis assay cell type - HeLa cells

A PCR reaction consists of the template DNA, two primers covering the amplification site, an enzyme, and buffers. A quantitative, real-time PCR reaction typically includes all of that plus a probe that can be detected fluorescently as the reaction runs, with no gel required. for detection. However, non-specific product amplification and primer-dimer formation during set-up are major causes of PCR failure. Nevertheless, high-quality DNA polymerase and optimize reaction buffers will certainly lead to a successful PCR reaction.

Get tips on using Corning™ Basal Cell Culture Liquid Media - DMEM and Ham's F-12, 50/50 Mix to perform Mammalian cell culture media HSG cells

Get tips on using pwPICZalpha-DT390-bi-pIL-2-Gly to perform Protein Expression Eukaryotic cells - P. pastoris Porcine IL-2 fusion toxins

Get tips on using pFastBac-GP67-H6HA1-His-RhPV-IRES-EGFP to perform Protein Expression Eukaryotic cells - S. frugiperda HA1 of H6N1 AIV

Get tips on using Lipofectamine® 2000 Transfection Reagent to perform siRNA / RNAi /miRNA transfection Human Cells - HeLa Lipofectamine

Get tips on using Lipofectamine® 2000 Transfection Reagent to perform siRNA / RNAi /miRNA transfection Mouse - HeLa cells Lipofectamine