Kit de ensayo de proteínas Pierce™ Coomassie (Bradford)
Kit de ensayo de proteínas Pierce™ Coomassie (Bradford)
Thermo Scientific™

Kit de ensayo de proteínas Pierce™ Coomassie (Bradford)

El kit de ensayo de proteínas con Coomassie (Bradford) Thermo Scientific Pierce es una formulación estable y lista para suMás información
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Número de catálogoCantidad
23200950 mL
Número de catálogo 23200
Precio (MXN)
-
Cantidad:
950 mL
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El kit de ensayo de proteínas con Coomassie (Bradford) Thermo Scientific Pierce es una formulación estable y lista para su uso del reactivo de ensayo de Bradford tradicional para medir la concentración de proteínas totales en comparación con un estándar de proteínas. El kit incluye el reactivo de ensayo de proteínas con Coomassie y un paquete de ampollas de patrón de albúmina.

Compare todos los ensayos de Bradford disponibles ›

El kit de ensayo de proteínas con Coomassie Pierce es una formulación lista para su uso del popular reactivo de ensayo descrito originalmente por Bradford en 1976. Cuando se mezcla con una solución de proteínas, el reactivo del colorante Coomassie acídico cambia su color de marrón a azul en relación con la cantidad de proteínas presentes en la muestra. Las determinaciones de proteínas se realizan por comparación con la respuesta al color de estándares de ensayos de proteínas, normalmente preparados como una serie de diluciones conocidas de seroalbúmina bovina (BSA) o gammaglobulina bovina (BGG). El sencillo procedimiento se puede adaptar a prácticamente cualquier escala de volumen, incluidos tubos de ensayo, cubetas y microplacas. El ensayo de proteínas es compatible con la mayoría de las sales, disolventes, tampones, tioles, sustancias de reducción y agentes quelantes de metal que forman parte de las muestras de proteínas.

Las características del kit de ensayo de proteínas con Coomassie incluyen:
Reactivo Bradford: kit estable y listo para usar del clásico ensayo de reactivo Bradford
Colorimétrico: medido con un espectrofotómetro estándar o lector de placas a 595 nm
Fácil de usar: un solo reactivo, no es necesaria la preparación de un reactivo de trabajo
Rápido: desarrollo casi inmediato del color; añadir, mezclar y leer los resultados
Intervalo del ensayo: detecta la concentración de proteínas en el intervalo de 1 a 1500 µg/ml
Flexible: se suministran protocolos de microplaca y cubeta adaptables a diversas gamas de trabajos objetivo

Cómo detecta la proteína el ensayo Coomassie (Bradford)
El desarrollo de color en ensayos de proteínas basados en colorantes Coomassie (Bradford) se ha relacionado con la presencia de determinados aminoácidos básicos (principalmente arginina, lisina e histidina) en la proteína. Las fuerzas de Van der Waals y las interacciones hidrófobas también participan en la unión del colorante mediante proteínas. El número de ligandos de colorantes Coomassie unido a cada molécula de proteína es aproximadamente proporcional al número de cargas positivas detectadas en la proteína. Los aminoácidos libres, los péptidos y las proteínas de bajo peso molecular no producen color con los reactivos de colorantes Coomassie. En general, la masa de un péptido o proteína debe ser de al menos 3000 daltons para someterse a un ensayo con este reactivo.

Productos relacionados
Kit de ensayo Pierce Coomassie Plus (Bradford)
Kit de ensayo de Bradford compatible con detergentes Pierce
Rompedores de ampollas
Para uso exclusivo en investigación. No apto para uso en procedimientos diagnósticos.
Especificaciones
ensayoEnsayo de Bradford
Para utilizar con (aplicación)Detección basada en soluciones, absorbancia
Para utilizar con (equipo)Espectrofotómetro, lector de microplacas
Línea de productosPierce
Tipo de productoEnsayo de cuantificación de proteínas
Cantidad950 mL
EspecificidadSin especificidad
Suficiente para630 ensayos en tubo o 3800 ensayos en microplaca
Método de detecciónColorimétrico
Unit SizeEach
Contenido y almacenamiento
Suficiente para:
  • 630 ensayos de tubos o 3800 ensayos de microplacas
  • Reactivo de ensayo de proteínas Pierce Coomassie, 950 ml
  • Ampollas de patrón de albúmina, 2 mg/ml, 10 x 1 ml
Almacene el reactivo de ensayo de proteína Coomassie a 4 °C. Almacene las ampollas de patrón de albúmina sin abrir a temperatura ambiente.

Preguntas frecuentes

Can you provide the shelf-life for the Pierce Bradford Protein Assay Kit?

The Pierce Bradford Protein Assay Kit is covered under our general 1-year warranty and is guaranteed to be fully functional for 12 months from the date of shipment, if stored as recommended. Please see section 8.1 of our Terms & Conditions of Sale (https://www.thermofisher.com/content/dam/LifeTech/Documents/PDFs/Terms-and-Conditions-of-Sale.pdf) for more details.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.

Can I purchase the Pierce Bradford Protein Assay Reagent from the Pierce Bradford Protein Assay Kit as a stand-alone product?

Sorry, the Pierce Bradford Protein Assay Reagent is only available as a component of the Pierce Bradford Protein Assay Kit.

Find additional tips, troubleshooting help, and resources within our Protein Purification and Isolation Support Center.

I assayed two protein samples, each containing a different mixture of proteins of same concentration and observed very different color responses in the assay. What is the cause?

Each of the commonly used total protein assay methods exhibits some degree of varying response toward different proteins. These differences relate to amino acid sequence, pI, structure and the presence of certain side chains or prosthetic groups that can dramatically alter the protein’s color response. Most protein assay methods use BSA or immunoglobulin (IgG) as the standard against which the concentration of protein in the sample is determined. However, if great accuracy is required, prepare the standard curve from a pure sample of the target protein.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.

My buffer or components of my buffer are not listed in the compatibility table for my protein assay. What should I do?

You can test the tolerance of the assay for your specific buffer formulation. For in-house generated compatibility information, substances were considered compatible at the indicated concentration in the Standard Test Tube Protocol (found in the manual for each protein assay) if the error in protein concentration estimation caused by the presence of the substance was less than or equal to 10%. The substances were tested using WR prepared immediately before each experiment. Blank-corrected 562nm absorbance measurements (for a 1000µg/mL BSA standard + substance) were compared to the net 562nm measurements of the same standard prepared in 0.9% saline.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.

All the components of my sample buffer are at or below the indicated compatible concentration for my protein assay, but I am still seeing too much/too little color development. What could be the problem?

It is possible to have a substance additive affect such that even though a single component is present at a concentration below its listed compatibility, a sample buffer containing a combination of substances could interfere with the assay. You should take steps to eliminate or minimize the effects of the interfering substance(s) by diluting or removing the substance.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.

Citations & References (10)

Citations & References
Abstract
Silibinin Ameliorates
Authors:Lee SJ, Nam MJ, Lee DE, Park JW, Kang BS, Lee DS, Lee HS, Kwon OS
Journal:Int J Mol Sci
PubMed ID:30042374
'The mechanisms underlying the progression to non-alcoholic steatohepatitis (NASH) remain to be elucidated. In the present study, we aimed to identify the proteins involved in the pathogenesis of liver tissue inflammation and to investigate the effects of silibinin, a natural polyphenolic flavonoid, on steatohepatitis. We performed comparative proteomic analysis using ... More
Versican is differentially regulated in the adventitial and medial layers of human vein grafts.
Authors:Kenagy RD, Kikuchi S, Evanko SP, Ruiter MS, Piola M, Longchamp A, Pesce M, Soncini M, Deglise S, Fiore GB, Haefliger JA, Schmidt TA, Majesky MW, Sobel M, Wight TN
Journal:PLoS One
PubMed ID:30265729
'Changes in extracellular matrix proteins may contribute significantly to the adaptation of vein grafts to the arterial circulation. We examined the production and distribution of versican and hyaluronan in intact human vein rings cultured ex vivo, veins perfused ex vivo, and cultured venous adventitial and smooth muscle cells. Immunohistochemistry revealed ... More
The Epstein-Barr virus EBNA1 protein modulates the alternative splicing of cellular genes.
Authors:Boudreault S, Armero VES, Scott MS, Perreault JP, Bisaillon M
Journal:Virol J
PubMed ID:30832682
'Alternative splicing (AS) is an important mRNA maturation step that allows increased variability and diversity of proteins in eukaryotes. AS is dysregulated in numerous diseases, and its implication in the carcinogenic process is well known. However, progress in understanding how oncogenic viruses modulate splicing, and how this modulation is involved ... More
PGC1ß regulates multiple myeloma tumor growth through LDHA-mediated glycolytic metabolism.
Authors:Zhang H, Li L, Chen Q, Li M, Feng J, Sun Y, Zhao R, Zhu Y, Lv Y, Zhu Z, Huang X, Xie W, Xiang W, Yao P
Journal:Mol Oncol
PubMed ID:30051603
Multiple myeloma (MM) is an incurable hematologic malignancy due to inevitable relapse and chemoresistance development. Our preliminary data show that MM cells express high levels of PGC1ß and LDHA. In this study, we investigated the mechanism behind PGC1ß-mediated LDHA expression and its contribution to tumorigenesis, to aid in the development ... More
Targeting colorectal cancer cell metabolism through development of cisplatin and metformin nano-cubosomes.
Authors:Saber MM, Al-Mahallawi AM, Nassar NN, Stork B, Shouman SA
Journal:BMC Cancer
PubMed ID:30111296
Colorectal cancer (CRC) remains a leading cause of death worldwide. Utilizing cisplatin in CRC is correlated with severe adverse effects and drug-resistance. Combined anticancer drug-treatment, along with, their enhanced delivery, can effectively kill cancer through multiple pathways. Nano-cubosomes are emerging as nanocarriers for anticancer therapies, hence, we constructed nano-cubosomes bearing ... More