Biotin-X NTA [Biotin-X nitrilotriacetic acid, potassium salt] *CAS 856661-92-2*
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Physical properties
Molecular weight | 715.98 |
Solvent | DMSO |
Storage, safety and handling
H-phrase | H303, H313, H333 |
Hazard symbol | XN |
Intended use | Research Use Only (RUO) |
R-phrase | R20, R21, R22 |
Storage | Freeze (< -15 °C); Desiccated |
UNSPSC | 12352200 |
Related products
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See also: Biotin and Streptavidin
CAS 856661-92-2 | Molecular weight 715.98 |
Biotin-X nitrilotriacetic acid (biotin-X NTA) is widely used to detect histidine-tagged proteins immobilized on nitrocellulose membranes. The NTA moiety of biotin-X NTA chelates Ni ion that is also chelated with histidine tags. The NTA-polyHis-complex can be detected using standard enzyme-linked streptavidin methods. Biotin-X NTA can be used to detect less than 0.1 pmol of histidine-tagged protein using a streptavidin'horseradish peroxidase conjugate and chemiluminescence techniques. Biotin-X NTA can be removed from the histidine-tagged protein at pH 4.8, allowing the blot to be reanalyzed with another probe. In combination with fluorescent avidin conjugates, this NTA biotin derivative can be used for detecting polyhistidine-containing biomolecules such as fusion proteins. This NTA Biotin derivative is a bifunctional reagent that is used to detect histidine-tagged proteins immobilized. The nitrilotriacetic acid is used to chelate a Ni(II) ion at four of its six coordination sites. The remaining two sites are available for binding to a histidine tag. The biotin functional group can then be detected using a streptavidin-horseradish peroxidase conjugate and chemiluminescence. Using this biotinylated nitrilotriacetic acid, it is possible to detect less than 0.11 pmol of histidine-tagged Escherichia coli RNA polymerase sigma70 subunit. This reagent is also able to specifically detect His-tagged sigma70 from a whole cell lysate following SDS-PAGE and transfer to nitrocellulose. The reagent can be dissociated from the His-tagged protein at pH 4.8 and the blot can be reprobed with a monoclonal antibody for detection of different proteins on the same blot.
Example protocol
PREPARATION OF WORKING SOLUTION
1. Biotin-X NTA working solution (1mg/mL):
Add 1 mL of DMSO or ddH2O to Biotin-X NTA vial and mix well.
2. Staining Solution:
Prepare fresh Staining Solution (less than 30 minutes before use): prepare 20 mL of Staining Solution for each 8 cm ×10 cm blot by adding 20 μL of 10 mM NiCl2 , 20 μL of 1 mg/mL biotin-X NTA working solution and 1-2 μL of 1 mg/mL streptavidin–alkaline phosphatase to 20 mL of Blocking Buffer. Mix well. Note: Once the solution is made, it is ready to use right away, and remains stable for at least 30 minutes.
SAMPLE EXPERIMENTAL PROTOCOL
Sample Protocol for detection of His-tagged Protein in PVDF
- Prepare your PVDF blots as needed (block nonspecific binding sites and wash the blot).
- Incubate the blot with 20 mL of Staining Solution at room temperature for 30 minutes.
- Wash the blots, and pursuit for chemiluminescence detection.
Sample Protocol for Biotin-X NTA–Probed Blot Stripping
- If desired, the blot can be stained using other detection methods.
For staining with antibodies or lectins, strip the biotin-X NTA complex off the blot by incubating it in 62.5 mM Tris, 0.2% SDS, 50 mM dithiothreitol (DTT), pH 6.8, at 50°C for 40 minutes with gentle agitation. Or incubated overnight in 200 mM acetate acid with 40 mM EDTA, pH 4.8. - Wash the blot in Wash Buffer at room temperature 2-4 times for 5 minutes each and proceed with antibody detection.
Calculators
Common stock solution preparation
Table 1. Volume of DMSO needed to reconstitute specific mass of Biotin-X NTA [Biotin-X nitrilotriacetic acid, potassium salt] *CAS 856661-92-2* to given concentration. Note that volume is only for preparing stock solution. Refer to sample experimental protocol for appropriate experimental/physiological buffers.
0.1 mg | 0.5 mg | 1 mg | 5 mg | 10 mg | |
1 mM | 139.669 µL | 698.344 µL | 1.397 mL | 6.983 mL | 13.967 mL |
5 mM | 27.934 µL | 139.669 µL | 279.337 µL | 1.397 mL | 2.793 mL |
10 mM | 13.967 µL | 69.834 µL | 139.669 µL | 698.344 µL | 1.397 mL |
Molarity calculator
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Images
Citations
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References
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Volume of RBCs, 24- and 48-hour posttransfusion survivals, and the lifespan of (51)Cr and biotin-X-N-hydroxysuccinimide (NHS)-labeled autologous baboon RBCs: effect of the anticoagulant and blood pH on (51)Cr and biotin-X-NHS elution in vivo
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