| Species : |
Human |
| Source : |
Insect Cells |
| Tag : |
His |
| Protein Length : |
24-134 aa |
| Description : |
CC chemokine 21 (CCL21), also known as secondary lymphoidorgan chemokine (SLC), is a ligand for the chemokine receptor CCR7. CCL19 and CCL21 are the only ligands for CCR7, which is expressed by various subsets of immune cells. CCL19 and CCL21 function to recruit CCR7 expressing antigen presenting cells, like dendritic cells and naive T-cells, to the lymph nodes. CCL21 seems to be the critical CCR7 ligand regulating dendritic cell homeostasis and function. CCL21 has an unusual extended C-terminal tail for a chemokine. Only one gene exists for this chemokine in human beings, whereas mice have two. CCL21 Inhibit hemopoiesis and stimulates chemotaxis. Chemotactic in vitro for thymocytes and activated T-cells, but not for B-cells, macrophages, or neutrophils. |
| Form : |
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 with trehalose as protectant. |
| Bio-activity : |
Immobilized Human CCL21 Protein, His Tag at 5 μg/mL (100 μL/well) can bind Human CCR7 Full Length Protein, His, Flag Tag with a linear range of 0.01-0.313 μg/mL. |
| Molecular Mass : |
The protein has a calculated MW of 14.1 kDa. The protein migrates as 17-19 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE) due to glycosylation. |
| Endotoxin : |
Less than 0.1 EU/μg by the LAL method/rFC method. |
| Purity : |
>90% as determined by SDS-PAGE. |
| Storage : |
This product is stable after storage at: -20 to -70 centigrade for 12 months in lyophilized state; -70 centigrade for 3 months under sterile conditions after reconstitution. For long term storage, the product should be stored at lyophilized state at -20 centigrade or lower. Please avoid repeated freeze-thaw cycles. |
| Reconstitution : |
It is recommended that sterile water be added to the vial to prepare a stock solution of 0.2 μg/μL. Centrifuge the vial at 4 centigrade before opening to recover the entire contents. |
