Western Blotting Sample Preparation Products

western blot prep

Introduction

Western blotting among the most frequently employed techniques used to detect proteins based on antigen-antibody interactions. The first step of western blotting is sample preparation; your protein of interest must be extracted from the tissue or cell culture it’s expressed in, protected from degradation, and prepared to be run on a gel. Boster provides products for sample preparation, including specialized extraction kits, lysis buffers, and protease inhibitors.

Procedure

To extract a protein sample from a cell culture on solid medium, first rinse the culture with ice-cold PBS solution, then add ice-cold lysis buffer. Scrape adherent cells off the dish using a cold plastic scraper, or digest the cells with 0.05% trypsin. Once the cells are suspended, centrifuge the sample, draw off the supernatant fluid, and wash the pellet with ice cold PBS buffer. Re-suspend the cells in Boster mammalian cell protein extraction reagent and sonicate the solution for about 10-15 seconds, then lyse the cells with Boster RIPA lysis buffer and additional sonication. Centrifuge the sample to separate lipids and cellular debris from the soluble cell proteins, and aliquot the middle layer from the centrifuged sample into a fresh tube and store it at -20C.

The aliquots of cell lysis supernatant are ready for total protein quantification and gel electrophoresis.

For a detailed protocol of sample preparation starting with tissue samples, see our Western blot handbook.

Tips

  1. For best results, select the right type extraction kit for your sample
  2. If you observe weak signal, ghost bands, or inconsistent band sizes in your results, the source of error may be the protein extraction step. See our troubleshooting guides for more information
SKU AR0101
Pack size 100 mL (100 assays for 0.1g of tissuе)
Physical State Liquid
Applications Immunoassays: WB, ELISA, RIA, immunoprecipitation; reporter assays; protein kinase assays; protein purifications; folding studies; chromatographic studies; DNA-protein interaction assays
Availability: Ships next business day
SKU AR1182-1
Pack size1mL
Physical StateLiquid, colorless, transparent
Description Boster’s Broad Spectrum Protease Inhibitor Cocktail (EDTA free) is a complex of various protease inhibitors, which has been tested for inhibiting proteases and esterase broadly. 
Availability: Ships next business day
SKU AR0056
Pack size 5 mL
Form Supplied1:100 Concentrated stock solution of Proteinase K in Tris-HCl buffer
Reagent Type Assistant Reagent
Availability: Ships next business day
SKU AR1183
Product nameBroad Spectrum Phosphatase Inhibitor Cocktail
Pack size 1 mL
Applications WB sample preparation, protein purification, Co-IP, protein kinase activity assay experiments
Availability: Ships next business day
SKU AR1182
Pack size 1mLX2
Form Solution (liquid)
Applications Western blotting, protein purification, Co-IP; assays for protein expression, activity, modification, profiling and characterization, quantitative measurement; epitope tagging; reporter gene analysis
Availability: Ships next business day
SKU AR0105
Product name RIPA Lysis Buffer
Pack size 50ml
Form Solution (liquid)
Applications Western blotting, ELISA, immunofluorescence, Immunoprecipitation; protein purification; SDS-PAGE; protein assays; epitope tagging; reporter gene analysis

Availability: Ships in 5-7 business days

SKU AR1121
Pack size80mg (sufficient for 100mL of extract)
Physical StateWhite lyophilized powder
Applications Animal tissue and cell extract with detergent
Availability: Ships next business day
SKUAR1120
Size80mg, enough for 100ml of samples
Physical StateWhite lyophilized powder
ApplicationAnimal tissue and cell extract with detergent
Availability: Ships next business day
SKU AR0156
Pack size 1 kit
Applications SDS-PAGE, IP, Western Blotting, Dimensional Electrophoresis, Co-Immunoprecipitation Analysis and Enzymatic Determination
Availability: Ships next business day
SKU AR0155
Pack size 1 kit
Availability: Ships next business day
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