1. Recombinant Proteins
  2. Cytokines and Growth Factors
  3. Chemokine & Receptors
  4. CC Chemokines
  5. CCL21
  6. Exodus-2/CCL21 Protein, Human (sf9)

Exodus-2/CCL21 Protein, Human (sf9) is a homeostatic lymphoid chemokine that contributes to the entry of T cells and dendritic cells into the lymphoid T-zone. It acts through chemokine receptors CCR7 and CXCR3 to promote fibrogenic and inflammatory cytokine production. Exodus-2/CCL21 Protein, Human (sf9) is a recombinant human Exodus-2/CCL21 (S24-P134) expressed by Sf9 insect cells.

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Description

Exodus-2/CCL21 Protein, Human (sf9) is a homeostatic lymphoid chemokine that contributes to the entry of T cells and dendritic cells into the lymphoid T-zone. It acts through chemokine receptors CCR7 and CXCR3 to promote fibrogenic and inflammatory cytokine production. Exodus-2/CCL21 Protein, Human (sf9) is a recombinant human Exodus-2/CCL21 (S24-P134) expressed by Sf9 insect cells[1].

Background

CCL21, also known as exodus-2 and secondary lymphoid chemokine (SLC), is a small cytokine belonging to the CC chemokine family and is located on chromosome 9 in the human genome. It binds to glycosaminoglycan (GAG) and is anchored to the surface of endothelial cells. As a chemokine, CCL21 inhibits hematopoiesis and stimulates chemotaxis, and is chemotactic in vitro for thymocytes and activated T cells, but not for B cells, macrophages or neutrophils. At the same time, CCL21 is a potent stimulator of T cell migration and adhesion, binding to the glycoprotein PSGL-1 on T cells to promote the migration of T cells to secondary lymphoid organs. CCL21 can act through chemokine receptors CCR7 and CXCR3. Among them, CCR7 is a GPCR that is normally expressed by T cell subsets central memory cells, thymic T cells, B cells, mature DCs and other rare cell subsets. ccl21 can function as a microglia activator in the CNS and is expressed exclusively in endangered or mechanically damaged neurons[1][2].

In Vivo

CCL21(.1 µg/mL, 2 h) can interact with polysialic acid to regulate the migratory capacity of human dendritic cells[3].

Biological Activity

Measured by its binding ability in a functional ELISA. Immobilized Exodus-2/CCL21 Protein, Human (sf9) at 2 μg/mL (100 μl/well) can bind human IGFBP7 with a linear range of 0.16-4 μg/mL.

Species

Human

Source

Sf9 insect cells

Tag

Tag Free

Accession

O00585 (S24-P134)

Gene ID
Molecular Construction
N-term
CCL21 (S24-P134)
Accession # O00585
C-term
Synonyms
C-C motif chemokine 21; Beta-chemokine exodus-2; 6Ckine; SLC; CCL21; SCYA21
AA Sequence

MAQSLALSLLILVLAFGIPRTQGSDGGAQDCCLKYSQRKIPAKVVRSYRKQEPSLGCSIPAILFLPRKRSQAELCADPKELWVQQLMQHLDKTPSPQKPAQGCRKDRGASKTGKKGKGSKGCKRTERSQTPKGP

Molecular Weight

Approximately 18 kDa

Purity

Greater than 95% as determined by reducing SDS-PAGE

Appearance

Lyophilized powder.

Formulation

Lyophilized from a 0.2 μm filtered solution of 40 mM Tris, 0.3 M NaCl, pH 7.4. Normally 5 % - 8 % trehalose, mannitol and 0.01% Tween 80 are added as protectants before lyophilization.

Endotoxin Level

<1 EU/μg, determined by LAL method.

Reconstitution

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

Storage & Stability

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). 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

Exodus-2/CCL21 Protein, Human (sf9) Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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  • Dilution Calculator

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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 activity calculator equation

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

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

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Exodus-2/CCL21 Protein, Human (sf9)
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