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  4. B7-H2/ICOSLG B7-H2/CD275
  5. B7-H2/ICOSLG Protein, Human (HEK293, His)

B7-H2/ICOSLG Protein, Human (HEK293, His)

Cat. No.: HY-P7325
Handling Instructions

B7-H2/ICOSLG Protein, Human (HEK293, His) is a polypeptide chain containing the C-termimal His tag produced in HEK293 cells. ICOSLG is a number of the B7 family of co-stimulatory molecules.

For research use only. We do not sell to patients.

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Description

B7-H2/ICOSLG Protein, Human (HEK293, His) is a polypeptide chain containing the C-termimal His tag produced in HEK293 cells. ICOSLG is a number of the B7 family of co-stimulatory molecules.

Background

As a member of the B7 family, inducible co-stimulator ligand (ICOSLG) expressed on tumor cell has been reported to have an important role in tumor immunity. As the counter ligand of ICOS, a CD28-related molecule, ICOSLG is expressed on professional antigen-presenting cell (APCs; such as dendritic cells (DCs) and B cells) and on some tumor cells (such as glioma cells and gastric carcinoma cells). ICOSLG is the only B7 family member that preferentially co-stimulates type 2T helper cell (Th2) responses, and interestingly, this unique molecule has a critical role in antitumor immunity. ICOSLG expression on solid tumors (implanted-transfected tumors) aids in both NK mediated and CD8+ cytotoxic T cell (CTL) activation and killing. Several studies using ICOSLG-transfected solid tumor cell lines found that ICOSLG induced CD8+ cytotoxic lymphocyte-mediated tumor regression[1].

Biological Activity
1 µg/mL (100 µL/well) of immoblized recombinant human B7-H2/ICOSLG-His can bind human ICOS-Fc with a linear range of 2.29-185.2 ng/mL.
Species

Human

Source

HEK293

Accession

O75144 (D19-S258)

Gene ID
Synonyms
rHuB7-H2/ICOSLG, His; B7 homolog 2; B7RP-1; CD275
AA Sequence

DTQEKEVRAMVGSDVELSCACPEGSRFDLNDVYVYWQTSESKTVVTYHIPQNSSLENVDSRYRNRALMSPAGMLRGDFSLRLFNVTPQDEQKFHCLVLSQSLGFQEVLSVEVTLHVAANFSVPVVSAPHSPSQDELTFTCTSINGYPRPNVYWINKTDNSLLDQALQNDTVFLNMRGLYDVVSVLRIARTPSVNIGCCIENVLLQQNLTVGSQTGNDIGERDKITENPVSTGEKNAATWSHHHHHHHHHH

Molecular Weight

45-55 kDa

Appearance

Lyophilized powder.

Formulation

Lyophilized after extensive dialysis against PBS, 5% trehalose and mannitol.

Endotoxin Level

<0.2 EU/μg, determined by LAL method.

Reconstitution

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH2O or PBS.

Storage & Stability

Stored at -20°C. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer. It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Shipping

Room temperature in continental US; may vary elsewhere.

Documentation
References
  • Reconstitution Calculator

  • Dilution Calculator

  • Specific Active Calculator

The reconstitution calculator equation

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration
= ÷

The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

The specific active calculator equation

Specific Active (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Active (Unit/mg) = 106 ÷ Biological Activity (ED50)
Unit/mg = 106 ÷ ng/mL

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Product Name:
B7-H2/ICOSLG Protein, Human (HEK293, His)
Cat. No.:
HY-P7325
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