Imject™ cBSA (in PBS)
Imject™ cBSA (in PBS)
Thermo Scientific™

Imject™ cBSA (in PBS)

La albúmina sérica bovina cationizada (cBSA) Thermo Scientific Imject funciona como proteína portadora de gran inmunogenicidad y de sencilla utilizaciónMás información
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Número de catálogoCantidad
7715010 mg
Número de catálogo 77150
Precio (CLP)
518.890
Each
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Cantidad:
10 mg
Precio (CLP)
518.890
Each
Añadir al carro de la compra
La albúmina sérica bovina cationizada (cBSA) Thermo Scientific Imject funciona como proteína portadora de gran inmunogenicidad y de sencilla utilización para preparar antígenos para la producción de anticuerpos.

La cBSA Imject se prepara modificando la BSA nativa con un exceso de etilendiamina, fundamentalmente neutralizando todos los grupos carboxilo con carga negativa con aminas primarias con carga positiva. El resultado es una proteína con alta carga positiva (pI >11) con una inmunogenicidad significativamente mayor en comparación con la BSA nativa. Además, gracias al mayor número de aminas primarias se garantiza que se conjuguen más moléculas de antígeno con métodos convencionales de entrecruzamiento. La cBSA Imject es una opción excelente para la preparación de inmunógenos cuando se requiere mayor inmunogenicidad en relación con la BSA pero no se dan las condiciones óptimas para usar la hemocianina de lapa californiana (KLH) o la proteína Blue Carrier.

Características de la albúmina sérica bovina cationizada Imject:

• Albúmina sérica bovina (BSA) purificada cationizada y liofilizada en PBS.
• Proteína de un solo polipéptido con una masa molecular >67.000 daltons
• Contiene 59 restos de lisina, junto con otras muchas aminas primarias agregadas mediante cationización; la mayoría de estas pueden reaccionar con un reactivo de conjugación para unir antígenos.
• Carga neta positiva (pl >11), lo que confiere solubilidad en condiciones que no son adecuadas para la BSA nativa con carga negativa (pl 5,1).
• Inmunogenicidad significativamente mayor que la BSA nativa gracias a que la proteína con carga positiva se procesa de forma diferente por el sistema inmunitario (consultar referencias).

Las proteínas portadoras son moléculas grandes y complejas capaces de estimular una respuesta inmunitaria tras su inyección. La producción satisfactoria de anticuerpos específicos frente a antígenos pequeños (es decir, péptidos o compuestos farmacológicos) requiere que estos haptenos se conjuguen covalentemente con una molécula más grande y más compleja (normalmente una proteína) para hacerlos inmunogénicos. Las proteínas portadoras se seleccionan en función de su inmunogenicidad, su solubilidad y de si se puede lograr una conjugación adecuada con la proteína portadora. La BSA cationizada (cBSA) Imject, antes denominada “proteína SuperCarrier”, es muy soluble en tampones acuosos y contiene numerosas aminas primarias que pueden servir como elemento diana para la conjugación con glutaraldehído, EDC y otros reactivos de entrecruzamiento. Para la conjugación dirigida al grupo sulfhidrilo (p. ej., antígenos peptídicos que contienen cisteína), utilice la cBSA activada con maleimida Imject.

Productos relacionados
BSA Imject™ (en PBS)
Para uso exclusivo en investigación. No apto para uso en procedimientos diagnósticos.
Especificaciones
Cantidad10 mg
Línea de productosImject
Unit SizeEach
Contenido y almacenamiento
4 °C

Preguntas frecuentes

What do I need to consider when designing a peptide for antibody production?

We recommend that hydrophobic residues comprise 50% or less of all the residues in your sequence. Make sure there is at least one charged residue for every five amino acids: this is generally known to enhance the solubility of the peptide. Peptides (compared to polypeptides, which fold and bury the hydrophobic amino acids) are too small to fold, so just a few hydrophobic amino acids may leave them insoluble.

Other guidelines include:
Peptides containing multiple Cys, Met, and Trp can be hard to synthesize.
Some sequences are problematic in solid-phase peptide synthesis or cleavage and are best avoided; these include Asp-Pro sequences or stretches of amino acids that require bulky protecting groups on their side chains during synthesis.
Glycine is often good for antigenicity as it has only a hydrogen side chain; this allows for complete rotation.
Please note that we offer a Custom Antibody Production service (https://www.thermofisher.com/us/en/home/life-science/antibodies/custom-antibodies/custom-antibody-production.html) that includes the use of our proprietary Antigen Profiler and Antigen Preparation tool (https://www.thermofisher.com/us/en/home/life-science/antibodies/custom-antibodies/custom-antibody-production/antigen-profiler-antigen-preparation.html).

What is the optimal peptide length for antibody production?

Most peptide antigens range in length from 12 to 16 residues and are relatively easy to synthesize. Peptides of 9 residues or shorter have been effective antigens for antibody production, but peptides longer than 16 amino acids may contain several epitopes and form secondary structures. Peptides in excess of 18 residues begin to present more synthetic challenges. Before you synthesize your peptide, we recommend doing a BLASTP search using your peptide sequence. This is to make sure that the peptide is not homologous or identical to a sequence in a completely unrelated protein in the host animal.

Please note that we offer a Custom Antibody Production service (https://www.thermofisher.com/us/en/home/life-science/antibodies/custom-antibodies/custom-antibody-production.html) that includes the use of our proprietary Antigen Profiler and Antigen Preparation tool (https://www.thermofisher.com/us/en/home/life-science/antibodies/custom-antibodies/custom-antibody-production/antigen-profiler-antigen-preparation.html).

What happens if antibodies are stored improperly?

Improper storage of antibodies can lead to:
- Degradation: Loss of activity and specificity
- Aggregation: Formation of precipitates or clumps
- Reduced performance: Poor results in assays or experiments

Find additional tips, troubleshooting help, and resources within our Antibodies and Immunoassays Support Center.

What do antibody pair kits contain, how many samples can I process, and how can I find a list of antibody pair kits by target?

Antibody pair kits contain capture antibody, detection antibody, recombinant standard and HRP conjugate. Each contains enough reagents to process forty 96-well plates. A list of Antibody Pair Kits (https://www.thermofisher.com/us/en/home/life-science/protein-biology/protein-assays-analysis/elisa/antibody-pair-kits.html) is available by target.

Find additional tips, troubleshooting help, and resources within our Antibodies and Immunoassays Support Center.

What do Reagent Sets contain, how many samples can I process, and how can I check if a Reagent Set is available for my target?

Reagent Sets contain Capture Antibody, Detection Antibody, Recombinant Standard, HRP Conjugate, TMB Substrate and Stop Solution. Each contains enough reagents to process five 96-well plates. Reagent Sets are included in the main list of ELISA (https://www.thermofisher.com/us/en/home/life-science/protein-biology/protein-assays-analysis/elisa/antibody-pair-kits.html) kits (search by “Reagent Set”).

Find additional tips, troubleshooting help, and resources within our Antibodies and Immunoassays Support Center.