Protein Quantification

Dual-Range™ BCA Protein Assay Kit
The most highly used method for measuring protein concentration.

Dual-Range™ BCA Protein Assay Kit is the most used protein assay method. It based on bicinchoninic acid (BCA) for the colorimetric detection and quantitation of total protein in the 5–2,000 μg/mL concentration range. Like the Lowry method, the assay relies on the reduction of Cu2+ ions by protein. The Cu+ thus formed is detected by conversion into a violet-colored substance by reaction with bicinchoninate. Dual-Range™ BCA Protein Assay Kit is compatible with many detergents but not compatible with reducing agents such as DTT,DTE, and 2-Mercaptoethanol etc.
Product information



The BCA protein assay is based on a reduction of Cu2+ to Cu+ by proteins in alkaline solution with a sensitive and specific colorimetric detection of Cu+ by bicinchoninic acid (BCA). Two molecules of BCA chelate with each Cu+ and making the reduced copper from apple green to purple complex with strong absorbance at 562 nm.



Special Characteristic :


  • Broad linear range: with standard protocol for 20-2000 μg/mL and enhanced protocol for 5-250 μg/mL
  • Compatible: unaffected by typical concentrations of most ionic and nonionic detergents



Order Information :


Cat. No. Product Name Description

Dual-Range™ BCA Protein Assay Kit 

 1 kit

500mL Reagent A + 12 mL Reagent B + 10mL BSA (2mg/mL)

  For making 2500 microplate assays



Quick Instructions: 




Product Detail :



Figure 1. Standard curve of bovine serum albumin (BSA) and bovine gamma globulin (BGG) by using microplate procedure (37°C for 30mins).





Figure 2. Standard curve of BSA with 5% Triton X-100 or 8% SDS by using microplate procedure (37°C for 30mins).





Figure 3. Standard curve of BSA by using microplate procedure by using microplate procedure with enhanced protocol (60°C for 30 mins).




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