Measured by its ability to chemoattract THP‑1 human acute monocytic leukemia cells. Hedrick, J. et al. (1998) Blood 91:4242. The ED50 for this effect is 0.5‑2 µg/mL. Measured by its ability to chemoattract BaF3 mouse pro‑B cells transfected with human CCR1. The ED50 for this effect is 0.15‑0.75 µg/mL.
Source
E. coli-derived human CCL16/HCC-4 protein Gln24-Gln120
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Note
<0.01 EU per 1 μg of the protein by the LAL method.
Applications/Dilutions
Dilutions
Bioactivity
Bioactivity2
Theoretical MW
11 kDa. Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
Publications
Read Publications using 802-HC/CF in the following applications:
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.
3 months, -20 to -70 °C under sterile conditions after reconstitution.
Buffer
Lyophilized from a 0.2 μm filtered solution in Acetonitrile and TFA.
Purity
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain
Reconstitution Instructions
Reconstitute at 100 μg/mL in sterile PBS.
Notes
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for Recombinant Human CCL16/HCC-4 Protein, CF
C-C motif chemokine 16
CCL16
chemokine (C-C motif) ligand 16
Chemokine CC-4
Chemokine LEC
CKb12
HCC4
HCC-4
HCC-4Liver-expressed chemokine
LCC-1Lymphocyte and monocyte chemoattractant
LEC
liver CC chemokine-1
LMC
LMCSmall-inducible cytokine A16
monotactin-1
Mtn-1
NCC-4
NCC4IL-10-inducible chemokine
NCC-4ILINCK
new CC chemokine 4
SCYA16MGC117051
SCYL4
small inducible cytokine subfamily A (Cys-Cys), member 16
Background
Human HCC-4, also named NCC-4, liver-expressed chemokine (LEC), and lymphocyte and monocyte chemoattractant (LMC), is a novel CC chemokine identified through bioinformatics. HCC-4 cDNA encodes a 120 amino acid (aa) residue precursor protein with a 23 aa residue predicted signal peptide that is cleaved to generate a 97 aa residue mature protein. HCC-4 is distantly related to other CC chemokines, exhibiting less than 30% aa sequence identity. Among these CC chemokines, HCC-4 has the most similarity to HCC-1. Two potential polyadenylation signals are present on the human HCC-4 gene, and as a result, two transcripts containing approximately 1,500 base pairs and 500 base pairs have been detected. HCC-4 is expressed weakly by some lymphocytes, including NK cells, gamma δ T cells, and some T cell clones. The expression of HCC-4 in monocytes is highly upregulated in the presence of IL-10. The HCC-4 gene has been mapped to chromosome 17q where multiple CC chemokines are clustered.
Recombinant HCC-4 has been shown to chemoattract human monocytes and THP-1 cells but not resting lymphocytes or neutrophils. HCC-4 has also been found to suppress proliferation of myeloid progenitor cells. The HCC-4 induced calcium flux in THP-1 cells can be desensitized by prior exposure to RANTES, suggesting that HCC-4 and RANTES share the same receptor in THP-1 cells.
Shoudai, K. et al. (1998) Biochim. Biophys. Acta 1396:273.
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