TLR9 ligand
CpG oligodeoxynucleotide (Type B) with phosphorothioate backbone. Specific ligand for mouse TLR9 (Toll-like receptor 9).
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Figure 2: TLR9-dependent mitogenic activity of ODN 1668 (TLRGRADE®) (synthetic) (Prod. No. ALX-746-001) in mouse splenocytes. Method: Culture of 5×105 cells per 200µl well was performed in serum-free conditions after addition of ODNs at the indicated concentrations. Cell proliferation was analyzed after 72 hours with a 16 hours3H-thymidine pulse.Only CpG ODN 1668 (Prod. No. ALX-746-001)

Figure 1: TLR9-dependent activation of mouse macrophages by ODN 1668 (TLRGRADE®) (synthetic) (Prod. No. ALX-746-001). Method: Culture of 5×105 cells per 200µl well was performed in serum-free conditions after addition of ODNs at the indicated concentrations. Cell activation was measured by IL12-p40 induction. Only CpG ODN 1668 (Prod. No. ALX-746-001)


Product Details
Couple Target |
TLR, TLR9 |
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Couple Type |
Ligand |
Endotoxin Content |
<0.002EU/µg (LAL test; BioWhittaker) |
Formulation |
Lyophilized. Sterile. |
MW |
6383 (ammonium salt) |
Purity Detail |
Activity and endotoxin tested – TLRGRADE®. |
Quantity |
100µg (~15nmol). Sufficient for at least 100 cellular activation assays at 0.1-0.5µg/well when performed in a 200µl assay volume (i.e. 96 well microtiter plate). |
Reconstitution |
For a 100µM stock solution, dissolve the total vial content in 150µl endotoxin-free water (included) or PBS (to order separately). To obtain optimal dissolving we recommend the following procedure:- Add 50% of the solvent and let dissolve for 10 min.- Add remaining 50% of the solvent and mix thoroughly.- Moderate warming may aid dissolving. |
Sequence |
5’-tccatgacgttcctgatgct-3’ (lower case letters indicate phosphorothioate linkage). |
Source |
Synthetic. |
Technical Info / Product Notes |
Includes 1 vial of ddWater (endotoxin-free) (Prod. No. ALX-505-008). |
Handling & Storage
Use/Stability |
As indicated on product label or CoA when stored as recommended. Aqueous stock solution is stable for 1 day when stored at +4°C. |
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Handling |
Protect from light. For maximum product recovery after thawing, centrifuge the vial before opening the cap. After reconstitution, prepare aliquots and store at -20°C. |
Long Term Storage |
+4°C |
Shipping |
Ambient Temperature |
Regulatory Status |
RUO – Research Use Only |
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- Distinct effects of different adjuvants in the mouse model of allergic airway inflammation: H.S. Shin, et al.; Asian Pac. J. Allergy Immunol. 40, 111 (2022), Abstract
- Paneth Cells Regulate Lymphangiogenesis under Control of Microbial Signals during Experimental Portal Hypertension: M. Hassan, et al.; Biomedicines 10, 1503 (2022), Abstract
- Frequent mutations that converge on the NFKBIZ pathway in ulcerative colitis: Kakiuchi, N., Yoshida, K., et al.; Nature 577, 260 (2020), Abstract
- Ly6C+ monocyte efferocytosis and cross-presentation of cell-associated antigens: S.R. Larson, et al.; Cell Death Differ. 23, 997 (2016), Application(s): Efferocytosis assay, in vivo studies, Abstract — Full Text
- Activation of murine macrophages via TLR2 and TLR4 is negatively regulated by a Lyn/PI3K module and promoted by SHIP1: S. Keck, et al.; J. Immunol. 184, 5809 (2010), Abstract — Full Text
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Alternative Name | CpG-B |
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Couple Type | Ligand |
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