CREB (Phospho-S121) Rabbit Polyclonal Antibody

Datasheet

MSDS

CREB (Phospho-S121) Rabbit Polyclonal Antibody

Key features and details

Rabbit polyclonal antibody to CREB (Phospho-S121)

Target: CREB (Phospho-S121)
Source/Host: Rabbit
Reactivity: Human,Mouse,Rat,Bovine,Chicken,Pig,Sheep,Zebrafish
Clonality: Polyclonal
Applications: WB, IHC
Conjugation: Unconjugated
Storage: at-20°C

Brand:

CAT.NO. : APA06840

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Size:

50μL 100μL

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Product Details

Background

Phosphorylation-dependent transcription factor that stimulates transcription upon binding to the DNA cAMP response element (CRE), a sequence present in many viral and cellular promoters . Transcription activation is enhanced by the TORC coactivators which act independently of Ser-119 phosphorylation , a sequence present in many viral and cellular promoters . Transcription activation is enhanced by the TORC coactivators which act independently of Ser-119 phosphorylation . Involved in different cellular processes including the synchronization of circadian rhythmicity and the differentiation of adipose cells . Regulates the expression of apoptotic and inflammatory response factors in cardiomyocytes in response to ERFE-mediated activation of AKT signaling .

Application

To ensure optimal assay performance, AREX recommends conducting reagent titration tailored to each testing system for optimal detection results.

WB	1:500 - 1:1000
IHC	1:100 - 1:200

*Results are sample-specific. Please refer to your local assay conditions and test parameters for reference.

Overview

Description	Rabbit polyclonal antibody to CREB (Phospho-S121)
Specificity	Recognizes endogenous levels of CREB protein only when phosphorylated at S121.
Antibody Type	Primary antibody
Imnunogen	KLH-conjugated synthetic phosphopeptide corresponding to residues surrounding S121 of human CREB protein. The exact sequence is proprietary.
Purification	The antibody was purified by immunogen affinity chromatography.
Molecular Weight	Predicted: 35 kD; Observed: 43 kD
Form/Buffer	Liquid in 0.42% Potassium phosphate, 0.87% Sodium chloride, pH 7.3, 30% glycerol, and 0.01% sodium azide.
Alternative Names	Cyclic AMP-responsive element-binding protein 1; CREB-1; cAMP-responsive element-binding protein 1
Gene Symbol	CREB1
Entrez Gene	1385(Human); 12912(Mouse); 81646(Rat)
SwissProt	P16220(Human); Q01147(Mouse); P15337(Rat)

*AREX continuously optimizes our products. Webpage content may not reflect the latest updates. For inquiries, please contact info@arexbio.com or your local distributor.
*Clone Number, Reactivity, Source/Host and Clonality can be found in the product name and Key Features section above.

Data

Western blot analysis of CREB (Phospho-S121) expression in DLD (A) whole cell lysates. (Predicted band size: 35 kD; Observed band size: 43 kD)

Immunohistochemical analysis of CREB (Phospho-S121) staining in human breast cancer formalin fixed paraffin embedded tissue section. The section was pre-treated using heat mediated antigen retrieval with sodium citrate buffer (pH 6.0). The section was then incubated with the antibody at room temperature and detected using an HRP conjugated compact polymer system. DAB was used as the chromogen. The section was then counterstained with haematoxylin and mounted with DPX.

Direct ELISA antibody dose-response curve using Anti-CREB (Phospho-S121) Antibody. Antigen (Phosphopeptide and non-phosphopeptide) concentration is 5 ug/ml. Goat Anti-Rabbit IgG (H&L) - HRP was used as the secondary antibody, and signal was developed by TMB substrate.

Storage

Store at 4°C short term. For long term storage, store at -20°C, avoiding freeze/thaw cycles.

Note

For Research Use Only. Not for diagnostic, therapeutics, prophylactic or in vivo use.

FAQs

What are the main types of research antibodies and how do they differ?

Research antibodies are mainly divided into monoclonal antibodies and polyclonal antibodies. Monoclonal antibodies typically offer higher specificity and better batch-to-batch consistency, while polyclonal antibodies often provide stronger affinity but may show more variation between batches. The choice depends on your specific experimental needs.

How can I tell if a research antibody is suitable for my experiment?

It is recommended to carefully review the product datasheet for validated applications, species reactivity, recommended dilutions, and published references. For new antibodies, performing a small-scale validation with positive control samples is usually helpful.

Can improper storage of research antibodies affect experimental results?

Yes. Antibodies are sensitive to temperature, repeated freeze-thaw cycles, and contamination. Improper storage may lead to reduced activity, increased background, or weaker signals. It is best to follow the storage instructions provided in the product datasheet.

Why doesn’t the recommended dilution in the datasheet work well in my experiment?

The recommended dilution is based on the supplier’s test conditions. Factors such as sample type, fixation method, and detection system in your lab can influence the optimal working concentration. Performing a dilution series optimization in your own system is often necessary.

What precautions should I take when using a newly purchased research antibody for the first time?

It is advisable to briefly centrifuge the antibody (especially concentrated or lyophilized ones), then perform a small-scale pilot experiment using the recommended conditions. Recording the batch number and usage date is also helpful for future tracking.

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