BCA Protein Colorimetric Detection Kit (Two Plate)

Article No K041-H1
Product Type Assay & Detection
Size 2x96 well plate

This product is not available for sale in your country. Please feel free to contact the help desk if you have any questions.


Country Availability DK, EE, FI, IS, LT, LV, NO, SE
Data Sheet Link http://www.arborassays.com/documentation/inserts/K041-H1.pdf
Description BCA Protein Colorimetric Detection Kit (Two Plate)
Supplier Arbor Assays Inc.
Notes Protein determination is one of the most common operations performed in biochemical research. The principle of the bicinchoninic acid (BCA) assay is similar to the Lowry assay1, and relies on the formation of a Cu2+-protein complex under alkaline conditions2, followed by reduction of the Cu2+ to Cu1+. The amount of reduction is proportional to protein present. It has been shown that cysteine, cystine, tryptophan, tyrosine, and peptide bonds2 are able to reduce Cu2+ to Cu1+. BCA forms a purple-blue complex with Cu1+ in alkaline environments, thus providing a basis to monitor the reduction of alkaline Cu2+ by proteins. The method combines the well-known reduction of Cu2+ to Cu1+ by protein in an alkaline medium (the biuret reaction) with the highly sensitive and selective colorimetric detection of the cuprous cation (Cu+1) using a unique reagent containing bicinchoninic acid. The purple-colored reaction product of this assay is formed by the chelation of two molecules of BCA with one cuprous ion. This water-soluble complex exhibits a strong absorbance at 562nm that is nearly linear with increasing protein concentrations over a broad working range (6-1,000 μg/mL). The BCA chemistry is not a true end-point method; that is, the final color continues to develop. However, following incubation, the rate of continued color development is sufficiently slow to allow large numbers of samples to be assayed together.
Protocol The DetectX® BCA Protein Assay Kit is designed to quantitatively measure total protein content in a variety of samples. The assay measures all types of proteins from all species. Please read the complete kit insert before performing this assay. A bovine serum albumin (BSA) standard is provided to generate a standard curve for the assay and all samples should be read off of the standard curve. Samples are diluted in water and added to the wells. The BCA Color Solution is made by mixing the BCA Reagent with the BCA Enhancer. The BCA Color Solution is added to all wells and the plate incubated at 37°C. Protein in the samples reacts with the BCA Color Reagent to generate a purple colored product which is read at 560 nm.
References 1. Lowry OH, Rosebrough NJ, Farr AL, Randall RJ., “Protein measurement with the Folin phenol reagent”. J. Biol. Chem. 1951, 193 (1): 265–75.2. Smith, PK, et. al., “Measurement of protein using bicinchoninic acid.”, Anal. Biochem., 1985, 150: (1), 76-85.
Sensitivity 6.65 μg/mL (Regular Format). 1.68 μg/mL (High Sensitivity Format).
Species Reactivity species independent
Storage All components of this kit should be stored at room temperature until the expiration date of the kit.
Technical Specifications Supplied ComponentsClear 96 well Half Area Plates 2 Plates Catalog Number X018-2EACorning Costar Plate 3695. Bovine Serum Albumin Standard 200 μL Catalog Number C143-200ULBovine Serum Albumin (BSA) at 10 mg/mL BCA Reagent 16 mL Catalog Number C144-16MLBCA Reagent solution BCA Enhancer 320 μL Catalog Number C145-320ULBCA Enhancer solution containing copper sulfate Plate Sealers 2 Each Catalog Number X002-1EA
Product Page Updated 2019-01-03T09:12:03.477Z

Shipping info

The delivery time for this item is approximately 5-8 business days. If other deviations occur, this will be noted on the order confirmation or communicated via email. Please note, we do reserve the right to select the best packaging and shipping method in order to insure the stability of the product and allow efficient order tracking.

Species reactivity:

species independent

Product insert:

Product data sheet