ATM (Phospho-S1981) Rabbit Polyclonal Antibody

Datasheet

MSDS

ATM (Phospho-S1981) Rabbit Polyclonal Antibody

Key features and details

Rabbit polyclonal antibody to ATM (Phospho-S1981)

Target: ATM (Phospho-S1981)
Source/Host: Rabbit
Reactivity: Human,Mouse,Rat
Clonality: Polyclonal
Applications: WB, IF/ICC
Conjugation: Unconjugated
Storage: at-20°C

Brand:

CAT.NO. : APA08351

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Size:

50μL 100μL

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Product Details

Background

Serine/threonine protein kinase which activates checkpoint signaling upon double strand breaks (DSBs), apoptosis and genotoxic stresses such as ionizing ultraviolet A light (UVA), thereby acting as a DNA damage sensor , apoptosis and genotoxic stresses such as ionizing ultraviolet A light (UVA), thereby acting as a DNA damage sensor . Recognizes the substrate consensus sequence [ST]-Q . Phosphorylates 'Ser-139' of histone variant H2AX at double strand breaks (DSBs), thereby regulating DNA damage response mechanism . Also plays a role in pre-B cell allelic exclusion, a process leading to expression of a single immunoglobulin heavy chain allele to enforce clonality and monospecific recognition by the B-cell antigen receptor (BCR) expressed on individual B-lymphocytes.

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
IF/ICC	1:50 - 1:200

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

Overview

Description	Rabbit polyclonal antibody to ATM (Phospho-S1981)
Specificity	Recognizes endogenous levels of ATM protein only when phosphorylated at S1981.
Antibody Type	Primary antibody
Imnunogen	KLH-conjugated synthetic phosphopeptide corresponding to residues surrounding S1981 of human ATM protein. The exact sequence is proprietary.
Purification	The antibody was purified by immunogen affinity chromatography.
Molecular Weight	Predicted: 350 kD; Observed: 350 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	Serine-protein kinase ATM; Ataxia telangiectasia mutated; A-T mutated
Gene Symbol	ATM
Entrez Gene	472(Human); 11920(Mouse)
SwissProt	Q13315(Human); Q62388(Mouse)

*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 ATM (Phospho-S1981) expression in HEK293T (A) whole cell lysates. (Predicted band size: 350 kD; Observed band size: 350 kD)

Immunofluorescent analysis of ATM (Phospho-S1981) staining in MCF7 cells. Formalin-fixed cells were permeabilized with 0.1% Triton X-100 in TBS for 5-10 minutes and blocked with 3% BSA-PBS for 30 minutes at room temperature. Cells were probed with the primary antibody in 3% BSA-PBS and incubated overnight at 4 °C in a hidified chamber. Cells were washed with PBST and incubated with a AREX® Fluor 488 -conjugated secondary antibody (green) in PBS at room temperature in the dark. Phalloidin - AREX® Fluor 594 was used to stain Actin filaments (red). DAPI was used to stain the cell nuclei (blue).

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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