Helios (E4L5U) Rabbit mAb (BSA and Azide Free) #59976

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Supporting Data

REACTIVITY	H M
SENSITIVITY	Endogenous
MW (kDa)	58, 63-70, 85
Source/Isotype	Rabbit IgG

Application Key:

WB-Western Blotting
IHC-Immunohistochemistry

Species Cross-Reactivity Key:

H-Human
M-Mouse

Product Information

Product Usage Information

This product is the carrier-free version of product #89270. All data were generated using the same antibody clone in the standard formulation which contains BSA and glycerol.

This formulation is ideal for use with technologies requiring specialized or custom antibody labeling, including fluorophores, metals, lanthanides, and oligonucleotides. It is not recommended for ChIP, ChIP-seq, CUT&RUN, or CUT&Tag assays. If you require a carrier-free formulation for chromatin profiling, please contact us. Optimal dilutions/concentrations should be determined by the end user.

BSA and Azide Free antibodies are quality control tested by size exclusion chromatography (SEC) to determine antibody integrity.

Formulation

Supplied in 1X PBS (10 mM Na₂HPO₄, 3 mM KCl, 2 mM KH₂PO₄, and 140 mM NaCl (pH 7.8)). BSA and Azide Free.

For standard formulation of this product see product #89270.

Storage

Store at -20°C. This product will freeze at -20°C so it is recommended to aliquot into single-use vials to avoid multiple freeze/thaw cycles. A slight precipitate may be present and can be dissolved by gently vortexing. This will not interfere with antibody performance.

Specificity / Sensitivity

Helios (E4L5U) Rabbit mAb (BSA and Azide Free) recognizes endogenous levels of total Helios protein. Non-specific non-nuclear staining was observed in some mouse tissues by immunohistochemistry.

Species Reactivity:

Human, Mouse

The antigen sequence used to produce this antibody shares 100% sequence homology with the species listed here, but reactivity has not been tested or confirmed to work by CST. Use of this product with these species is not covered under our Product Performance Guarantee.

Species predicted to react based on 100% sequence homology:

Bovine

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Gly73 of human Helios protein.

Background

Helios (Ikaros family zinc finger 2, IKZF2) is an Ikaros family transcription factor composed of several zinc fingers that mediate DNA binding and homodimerization or heterodimerization with other Ikaros family proteins (1,2). In the hematopoietic system, Helios expression is restricted to T cells and early hematopoietic progenitors (1,2). In regulatory T cells, expression of Helios contributes to an anergic phenotype by binding to the IL-2 promoter and suppressing IL-2 transcription (3). In addition, alteration of the corresponding Helios gene IKZF2 is one hallmark of low-hypodiploid acute lymphoblastic leukemia (4).

Database Links

UniProt ID: Q9UKS7

Entrez-Gene Id: 22807

Limited Uses

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For Research Use Only. Not For Use In Diagnostic Procedures.

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