Tubacin
Based on 25 publication(s) in Google Scholar
Tubacin is a potent and selective inhibitor of HDAC6, with an IC50 value of 4 nM and approximately 350-fold selectivity over HDAC1. Tubacin also inhibits metallo-β-lactamase domain-containing protein 2 (MBLAC2).
For research use only. We do not sell to patients.
- Purity: 97.11%
- CAS No.: 537049-40-4
- Formula: C41H43N3O7S
- Molecular Weight:721.86
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Storage:Powder -20°C, 3 years , 4°C, 2 years ; In solvent -80°C, 1 year , -20°C, 6 months
Publications Citing Use of MedChemExpress (MCE) Tubacin
More- Cell. 2025 Jun 12;188(12):3219-3237.e18. [Abstract]
- Nat Metab. 2024 Aug;6(8):1505-1528. [Abstract]
- Cell Stem Cell. 2025 Jul 3;32(7):1071-1086.e8. [Abstract]
- Nat Commun. 2026 May 15. [Abstract]
- Nat Commun. 2026 Feb 12;17(1):1214. [Abstract]
- Nat Commun. 2021 Jan 28;12(1):662. [Abstract]
- Biomark Res. 2025 Apr 7;13(1):57. [Abstract]
- Cell Death Dis. 2024 Aug 7;15(8):570. [Abstract]
- Cell Commun Signal. 2025 Oct 3;23(1):417. [Abstract]
- Apoptosis. 2020 Oct;25(9-10):697-714. [Abstract]
- Genes Dev. 2020 Feb 1;34(3-4):194-208. [Abstract]
- Biomed Pharmacother. 2019 Jun:114:108805. [Abstract]
- Cell Death Discov. 2025 Apr 10;11(1):162. [Abstract]
- Clin Transl Med. 2025 Jan;15(1):e70193. [Abstract]
- EMBO Rep. 2025 Mar 28. [Abstract]
- JCI Insight. 2022 Jan 11;7(1):e153948. [Abstract]
- Int J Oncol. 2020 Jun;56(6):1429-1441. [Abstract]
- J Cell Physiol. 2020 Oct;235(10):7030-7042. [Abstract]
- Sci Rep. 2024 May 4;14(1):10276. [Abstract]
- J Pharmacol Exp Ther. 2019 Sep;370(3):490-503. [Abstract]
- Biochim Biophys Acta Mol Cell Res. 2026 Jun;1873(5):120164. [Abstract]
- FEBS Lett. 2026 May 26. [Abstract]
- Research Square Print. 2023 Mar 9.
- Università degli Studi di CAGLIARI. 2021 May.
- Florida Southern College. 2019 May.
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Cell Proliferation/Viability Assay
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Flow Cytometry
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Cell Imaging/Staining
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IF
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IF
All Beta-lactamase Isoforms
More
Biological Activity
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HDAC6 4 nM (IC50) |
HDAC3 1.27 μM (IC50) |
HDAC8 1.27 μM (IC50) |
HDAC1 1.40 μM (IC50) |
HDAC5 3.35 μM (IC50) |
HDAC10 3.71 μM (IC50) |
HDAC11 3.79 μM (IC50) |
HDAC9 4.31 μM (IC50) |
HDAC2 6.27 μM (IC50) |
HDAC7 9.70 μM (IC50) |
HDAC4 17.30 μM (IC50) |
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Cell Line
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Type | Value | Description | References |
|---|---|---|---|---|
| A549 | EC50 |
2.5 μM
Compound: 38
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Inhibition of HDAC-6 in human A549 cells assessed as induction of alpha-tubulin acetylation after 20 hrs by cytoblot analysis
Inhibition of HDAC-6 in human A549 cells assessed as induction of alpha-tubulin acetylation after 20 hrs by cytoblot analysis
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10.1039/C1MD00199J |
| A549 | EC50 |
2.9 μM
Compound: Tubacin
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Inhibition of HDAC6 in human A549 cells assessed as induction of alpha-tubulin acetylation by fluorescence microscopy
Inhibition of HDAC6 in human A549 cells assessed as induction of alpha-tubulin acetylation by fluorescence microscopy
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[PMID: 16408003] |
| HeLa | IC50 |
2.9 μM
Compound: Tubacin
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Inhibition of HDAC6 in human HeLa cells using acetyl tubulin as substrate assessed as Ac-Lys accumulation in nuclear histones after 6 hrs by immunofluorescence assay
Inhibition of HDAC6 in human HeLa cells using acetyl tubulin as substrate assessed as Ac-Lys accumulation in nuclear histones after 6 hrs by immunofluorescence assay
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[PMID: 23964961] |
| HeLa | IC50 |
2.9 μM
Compound: Tubacin
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Inhibition of HDAC6 in human HeLa cells assessed as reduction in K40 hyperacetylation of alpha-tubulin incubated for 6 hrs by immunofluorescence assay
Inhibition of HDAC6 in human HeLa cells assessed as reduction in K40 hyperacetylation of alpha-tubulin incubated for 6 hrs by immunofluorescence assay
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[PMID: 25454270] |
| T-24 | EC50 |
2.9 μM
Compound: Tubacin
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Induction of histone H3 acetylation in human T24 cells
Induction of histone H3 acetylation in human T24 cells
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[PMID: 19111466] |
Tubacin preferentially induces α-tubulin hyperacetylation at a concentration of 2.5 μM, and induces α-tubulin acetylation at 5 μM and protects prostate cancer (LNCaP) cells from hydrogen peroxide-induced death at 8 μM via peroxiredoxin acetylation[1]. Tubacin (2.5 and 5 μM) specifically induces acetylation of α-tubulin in MM cells. Tubacin significantly inhibits both drug-sensitive and drug-resistant MM cell growth, with IC50 5-20 μM at 72 h. Tubacin also induces apoptosis by activation of caspases. Moreover, Tubacin inhibits binding of HDAC6 with dynein, and it induces significant accumulation of polyubiquitinated proteins, when combined with bortezomib. Tubacin and bortezomib induce synergistic antitumor activity in MM cell lines, and inhibits paracrine MM Cell Growth. Tubacin (5 μM) synergistically enhances bortezomib-induced cytotoxicity in patient MM cells without cytotoxicity to PBMCs[2]. Tubacin can concentration-dependently inhibits JEV-induced cytopathic effect and apoptosis, as well as reduces virus yield in human cerebellar medulloblastoma cells. The IC50 of virus yield is 0.26 μM for Tubacin. Tubacin also meaningfully blocks the production of intracellular infectious virus particles, with an IC50 of 1.52 μM. Tubacin induces the hyperacetylation of a HDAC6 substrate Hsp90 and reduces the interaction of Hsp90 with JEV NS5 protein[3].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Chemical Information
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CAS No. 537049-40-4
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Appearance Solid
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Molecular Weight 721.86
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Formula C41H43N3O7S
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Color White to off-white
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SMILES
OCC(C=C1)=CC=C1[C@@H]2C[C@H](CSC3=NC(C4=CC=CC=C4)=C(C5=CC=CC=C5)O3)O[C@H](C6=CC=C(NC(CCCCCCC(NO)=O)=O)C=C6)O2
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
Powder -20°C 3 years 4°C 2 years In solvent -80°C 1 year -20°C 6 months
Publications (25)
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Journal Impact Factor
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Most Recent
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Cell
2025 Jun 12;188(12):3219-3237.e18. PMID: 40250420 -
Nat Metab
2024 Aug;6(8):1505-1528. PMID: 39134903 -
Cell Stem Cell
Establishing dorsal-ventral patterning in human neural tube organoids with synthetic organizers. [Abstract]2025 Jul 3;32(7):1071-1086.e8. PMID: 40373768 -
Nat Commun
Identification of a component of the tubulin poly-glutamylase complex required for phosphoinositide homeostasis and cilium assembly and maintenance. [Abstract]2026 May 15. PMID: 42140944 -
Nat Commun
Human iPSC-based Modeling of Pulmonary Fibrosis Reveals p300/CBP Inhibition Suppresses Alveolar Transitional Cell State. [Abstract]2026 Feb 12;17(1):1214. PMID: 41680175 -
Nat Commun
LPA signaling acts as a cell-extrinsic mechanism to initiate cilia disassembly and promote neurogenesis. [Abstract]2021 Jan 28;12(1):662. PMID: 33510165
Tubacin purchased from MedChemExpress. Usage Cited in: Nat Commun. 2021 Jan 28;12(1):662. [Abstract]
Quantification of cilium length of Ki67+ cells in Sox2-positive RG cells. Isolated cells from Lpar1+/+ cerebral cortex were treated with 2 μM tubacin or DMSO for 72 h, and isolated cells from Lpar1−/− cerebral cortex were infected with lentivirus expressed GFP or GFP-Lpar1 with or without 2 μM tubacin treatment for 72 h.
Tubacin purchased from MedChemExpress. Usage Cited in: Nat Commun. 2021 Jan 28;12(1):662. [Abstract]
Percentage of Ki67+ cells in Sox2-positive RG cells. Isolated cells from Lpar1+/+ cerebral cortex were treated with 2 μM tubacin or DMSO for 72 h, and isolated cells from Lpar1−/− cerebral cortex were infected with lentivirus expressed GFP or GFP-Lpar1 with or without 2 μM tubacin treatment for 72 h.
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Biomark Res
A novel indirubin- 3-monoxime derivative I3MV- 8b exhibits remarkable cytotoxicity against multiple myeloma by targeting TRIM28. [Abstract]2025 Apr 7;13(1):57. PMID: 40197552
Tubacin purchased from MedChemExpress. Usage Cited in: Biomark Res. 2025 Apr 7;13(1):57. [Abstract]
Heatmap showing the combination index (CI) values of I3MO and Tubacin (Tub, 3.125-25 μM) in MM cell lines. The cells were treated with various combinations of I3MO and Tub at different doses, and the CI values were calculated using the Chou-Talalay method. The heatmap color scale represents the CI values (indicated on the graph), with red indicating synergistic effect (CI < 1.0).
Tubacin purchased from MedChemExpress. Usage Cited in: Biomark Res. 2025 Apr 7;13(1):57. [Abstract]
Flow cytometry histogram showing the level of aggresome in MM cell lines ARP1 and U266 after treatment with DMSO control and I3MO (10 μM) and Tubacin (10 μM) for 6 h. Bar plots showing the mean fluorescence intensity (MFI) in corresponding cell lines and conditions.
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Cell Death Dis
Alternative splicing of BAZ1A in colorectal cancer disrupts the DNA damage response and increases chemosensitization. [Abstract]2024 Aug 7;15(8):570. PMID: 39112459 -
Cell Commun Signal
Tubacin alleviate the reproductive toxicity of deoxynivalenol in mouse oocytes and zygotes via strengthening microtubule stability. [Abstract]2025 Oct 3;23(1):417. PMID: 41044645
Tubacin purchased from MedChemExpress. Usage Cited in: Cell Commun Signal. 2025 Oct 3;23(1):417. [Abstract]
Representative light microscopy images showing oocytes in control, DON, and DON + Tubacin (2-6 μM) oocytes. Scale bar, 200 μm. Quantification of the percentage of oocytes that undergo PBE in vitro.
Tubacin purchased from MedChemExpress. Usage Cited in: Cell Commun Signal. 2025 Oct 3;23(1):417. [Abstract]
Representative light microscopy images showing oocytes in control, DON, and DON + Tubacin (4 μM) oocytes. Scale bar, 200 μm. C Quantification of the percentage of oocytes that undergo PBE in vitro.
Tubacin purchased from MedChemExpress. Usage Cited in: Cell Commun Signal. 2025 Oct 3;23(1):417. [Abstract]
Representative immunofluorescence images demonstrating spindle assembly in mouse metaphase I oocytes from control, DON, and DON + Tubacin (4 μM). Green, microtubule (β-Tubulin); red, aMTOCs (γ-Tubulin); blue, DNA (DAPI). Scale bar, 10 μm.
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Apoptosis
Valproic acid upregulates the expression of the p75NTR/sortilin receptor complex to induce neuronal apoptosis. [Abstract]2020 Oct;25(9-10):697-714. PMID: 32712736 -
Genes Dev
The microtubule regulator ringer functions downstream from the RNA repair/splicing pathway to promote axon regeneration. [Abstract]2020 Feb 1;34(3-4):194-208. PMID: 31919191 -
Biomed Pharmacother
Histone deacetylase 6 negatively regulated microRNA-199a-5p induces the occurrence of preeclampsia by targeting VEGFA in vitro. [Abstract]2019 Jun:114:108805. PMID: 30947018
Tubacin purchased from MedChemExpress. Usage Cited in: Biomed Pharmacother. 2019 Jun:114:108805. [Abstract]
Western blot is used for the detection of VEGFA and Hsp-90 with or without the treatment of Tubacin.
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Cell Death Discov
Mutant p53 upregulates HDAC6 to resist ER stress and facilitates Ku70 deacetylation, which prevents its degradation and mitigates DNA damage in colon cancer cells. [Abstract]2025 Apr 10;11(1):162. PMID: 40210861 -
Clin Transl Med
Pathogenic variants of TUBB8 cause oocyte spindle defects by disrupting with EB1/CAKP5 interactions and potential treatment targeting microtubule acetylation through HDAC6 inhibition. [Abstract]2025 Jan;15(1):e70193. PMID: 39834092 -
EMBO Rep
HDAC6 deacetylates ENKD1 to regulate mitotic spindle behavior and corneal epithelial homeostasis. [Abstract]2025 Mar 28. PMID: 40155750 -
JCI Insight
Transcriptional control of a collagen deposition and adhesion process that promotes lung adenocarcinoma growth and metastasis. [Abstract]2022 Jan 11;7(1):e153948. PMID: 34874914 -
Int J Oncol
Epigenetic inhibitors eliminate senescent melanoma BRAFV600E cells that survive long‑term BRAF inhibition. [Abstract]2020 Jun;56(6):1429-1441. PMID: 32236593 -
J Cell Physiol
Inhibition of HDAC6 by tubastatin A disrupts mouse oocyte meiosis via regulating histone modifications and mRNA expression. [Abstract]2020 Oct;235(10):7030-7042. PMID: 32017059 -
Sci Rep
Transcription factor 4 promotes increased corneal endothelial cellular migration by altering microtubules in Fuchs endothelial corneal dystrophy. [Abstract]2024 May 4;14(1):10276. PMID: 38704483 -
J Pharmacol Exp Ther
Downregulation of TrkB Expression and Signaling by Valproic Acid and Other Histone Deacetylase Inhibitors. [Abstract]2019 Sep;370(3):490-503. PMID: 31308194 -
Biochim Biophys Acta Mol Cell Res
The yin and yang interplay between HDAC6 and KDM1 regulates the lysosomal degradation of mutp53 in colon cancer cells undergoing TG-induced ER stress. [Abstract]2026 Jun;1873(5):120164. PMID: 42203131 -
FEBS Lett
Septin 9 PB domains coordinate centrosome positioning and microtubule acetylation to control epithelial polarity. [Abstract]2026 May 26. PMID: 42186334 -
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Solvent & Solubility
DMSO : 100 mg/mL (138.53 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 1 year; -20°C, 6 months. When stored at -80°C, please use it within 1 year. When stored at -20°C, please use it within 6 months.
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 1 year; -20°C, 6 months. When stored at -80°C, please use it within 1 year. When stored at -20°C, please use it within 6 months.
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
Select the appropriate dissolution method based on your experimental animal and administration route.
- For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
- To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for In Vivo experiments, it is recommended to prepare freshly and use it on the same day.
- The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.
Add each solvent one by one: 10% DMSO 40% PEG300 5% Tween-80 45% Saline
Solubility: ≥ 2.5 mg/mL (3.46 mM); Clear solution
This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.
Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
Please enter the basic information of animal experiments:
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Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
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%DMSO +
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
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%+
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+%Tween-80 + +
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%Saline +
The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Working solution concentration: 0.22 mg/mL
Method for preparing stock solution: mg drug dissolved in μL DMSO. Stock solution concentration: mg/mL.
1. Take μL DMSO stock solution;
2. Add μL .
μL , mix evenly;
3. Then add μL Tween 80, mix evenly;
4. Then add μL
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
Protocol
HDAC inhibitors TSA, VPA, tubacin, and TBSA are used in the assay. Cytotoxicity of HDACi to TE671 and BHK-21 cells is evaluated by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay. 5 × 104 cells per well are seeded in 96-well plates and then treated with the indicated concentration of each HDACi. After 48-h of treatment, 25 μL of MTT solution (5 mg/mL) is added to each well and incubated at 37 °C with 5% CO2 for 3 h. After three washings with phosphate buffer saline (PBS), 100 μL DMSO is added into each well for dissolving formazan crystals. OD570−630 is measured by micro-ELISA reader and survival rate are calculated to indicate suppressive effects of each HDACi on the survival of TE671 and BHK-21 cells. Survival rate (%) = ((Acontrol − Aexperiment)/Acontrol) × 100%. 50% cytotoxic concentration (CC50) values are calculated by computer program[3].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Purity & Documentation
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Data Sheet (283 KB)
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SDS (393 KB)
- English - EN (393 KB)
- Français - FR (393 KB)
- Deutsch - DE (393 KB)
- Norwegian - NO (393 KB)
- Español - ES (393 KB)
- Swedish - SV (393 KB)
- Italian - IT (393 KB)
- Korean - KR (393 KB)
- Portuguese - PT (393 KB)
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Handling Instructions (2659 KB)
References
[1]. Butler KV, et al. Rational design and simple chemistry yield a superior, neuroprotective HDAC6 inhibitor, tubastatin A. J Am Chem Soc. 2010 Aug 11;132(31):10842-6. [Content Brief]
[2]. Hideshima T, et al. Small-molecule inhibition of proteasome and aggresome function induces synergistic antitumor activity in multiple myeloma. Proc Natl Acad Sci U S A. 2005 Jun 14;102(24):8567-72. Epub 2005 Jun 3. [Content Brief]
[3]. Lu CY, et al. Tubacin, an HDAC6 Selective Inhibitor, Reduces the Replication of the Japanese Encephalitis Virus via the Decrease of Viral RNA Synthesis. Int J Mol Sci. 2017 May 1;18(5). [Content Brief]
[4]. Severin Lechner, et al. Target deconvolution of HDAC pharmacopoeia reveals MBLAC2 as common off-target. Nat Chem Biol. 2022 Apr 28. [Content Brief]
Complete Stock Solution Preparation Table
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 1 year; -20°C, 6 months. When stored at -80°C, please use it within 1 year. When stored at -20°C, please use it within 6 months.
| Optional Solvent | Concentration Solvent Mass | 1 mg | 5 mg | 10 mg | 25 mg |
|---|---|---|---|---|---|
| DMSO | 1 mM | 1.3853 mL | 6.9266 mL | 13.8531 mL | 34.6328 mL |
| 5 mM | 0.2771 mL | 1.3853 mL | 2.7706 mL | 6.9266 mL | |
| 10 mM | 0.1385 mL | 0.6927 mL | 1.3853 mL | 3.4633 mL | |
| 15 mM | 0.0924 mL | 0.4618 mL | 0.9235 mL | 2.3089 mL | |
| 20 mM | 0.0693 mL | 0.3463 mL | 0.6927 mL | 1.7316 mL | |
| 25 mM | 0.0554 mL | 0.2771 mL | 0.5541 mL | 1.3853 mL | |
| 30 mM | 0.0462 mL | 0.2309 mL | 0.4618 mL | 1.1544 mL | |
| 40 mM | 0.0346 mL | 0.1732 mL | 0.3463 mL | 0.8658 mL | |
| 50 mM | 0.0277 mL | 0.1385 mL | 0.2771 mL | 0.6927 mL | |
| 60 mM | 0.0231 mL | 0.1154 mL | 0.2309 mL | 0.5772 mL | |
| 80 mM | 0.0173 mL | 0.0866 mL | 0.1732 mL | 0.4329 mL | |
| 100 mM | 0.0139 mL | 0.0693 mL | 0.1385 mL | 0.3463 mL |