Human Helios Antibody

Catalog #: AF73091 Datasheet / COA / SDS

Catalog #	Availability	Size / Price	Qty
AF73091
AF73091-SP

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Human Helios Antibody Summary

Species Reactivity

Human

Specificity

Detects human Helios in direct ELISAs and Western blots.

Source

Polyclonal Sheep IgG

Purification

Antigen Affinity-purified

Immunogen

E. coli-derived recombinant human Helios
Ile6-Gln97
Accession # Q9UKS7

Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.

Applications

Recommended Concentration

Sample

Western Blot

0.1 µg/mL

Immunoprecipitated material from Jurkat human acute T cell leukemia cell line lysates and MOLT‑4 human acute lymphoblastic leukemia cell line lysates

Immunoprecipitation

4 µg/mL

See below

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

Scientific Data

Immunoprecipitation

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Immunoprecipitation of Human Helios. Helios was immunoprecipitated from 400 µg of Jurkat human acute T cell leukemia cell line and MOLT‑4 human acute lymphoblastic leukemia cell line lysates using 4 µg of Sheep Anti-Human Helios Antigen Affinity-purified Polyclonal Antibody (Catalog # AF73091) coated on 4 wells of a 96 well plate (Corning Costar EIA/RIA). Jurkat lysates, MOLT‑4 lysates, or control buffer were added to the wells and incubated for 2 hours at room temperature. Immunoprecipitated Helios was detected by Western blot under reducing conditions using 0.1 µg/mL Sheep Anti-Human Helios Antigen Affinity-purified Polyclonal Antibody (Catalog # AF73091) and Immunoblot Buffer Group 1. View our recommended buffer recipes for Immunoprecipitation.

Immunoprecipitation

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Immunoprecipitation of Human Helios. Helios was immunoprecipitated from 400 µg of Jurkat human acute T cell leukemia cell line and MOLT-4 human acute lymphoblastic leukemia cell line lysates using 4 µg of Sheep Anti-Human Helios Antigen Affinity-purified Polyclonal Antibody (Catalog # AF73091) coated on 4 wells of a 96 well plate (Corning Costar EIA/RIA). Jurkat or MOLT-4 lysates were added to the wells and incubated for 2 hours at room temperature. Immunoprecipitated Helios was detected by Western blot under reducing conditions using 0.1 µg/mL Mouse Anti-Human Helios Monoclonal Antibody (Catalog # MAB73091) and Immunoblot Buffer Group 1. View our recommended buffer recipes for Immunoprecipitation.

Reconstitution Calculator

Preparation and Storage

Reconstitution

Reconstitute at 0.2 mg/mL in sterile PBS.

Shipping

Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store immediately at the temperature recommended below.

Stability & Storage

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.

12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: Helios

Helios, also known as IKZF2, is a 70 kDa DNA-binding transcription regulator in the Ikaros family that contains four N-terminal C2H2-type zinc finger domains (amino acids 112-219) and two C-terminal zinc finger domains (amino acids 471-523). Helios is expressed in developing hematopoietic and epithelial tissues and in adult T cells and thymic-derived regulatory T cells (Treg). It forms homodimers and also heterodimers with other Ikaros family proteins Ikaros, Pegasus, Eos, and Aiolos. Alternate splicing of human Helios generates a short isoform that lacks three of the the N-terminal zinc finger domains. This isoform is overexpressed in T cell leukemias where it can still dimerize with Ikaros proteins but functions as a dominant negative regulator. Within amino acids 6-97, human and mouse Helios share 96% aa sequence identity.

Long Name

DNA-binding Protein Helios

Entrez Gene IDs

22807 (Human); 22779 (Mouse)

Alternate Names

Helios; IKAROS family zinc finger 2 (Helios); Ikaros family zinc finger protein 2; IKZF2; MGC34330; subfamily 1A, 2 (Helios); zinc finger DNA binding protein Helios; zinc finger protein Helios; ZNF1A2; ZNFN1A2