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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 7 - Jul 12
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Description
VRK1 His&Strep Tag Protein, HumanProduct Specification Species Human Accession Q99986 Amino Acid Sequence M1 K396 end Expression System E. coli Molecular Weight 48. 7 KDa Conjugation Unconjugated Physical Appearance Liquid Storage Buffer 50 mM Tris HCl (pH 7. 5), 200 mM NaCl, 20% glycerol, 1 mM DTT Stability & Storage 80 Guidelines Please use rapid thawing with running water to thaw the protein samples. For complete recovery, mix well and spin before use. Product must not be stored
Product Specification
| Species | Human |
| Accession | Q99986 |
| Amino Acid Sequence | M1-K396 end |
| Expression System | E.coli |
| Molecular Weight | 48.7 KDa |
| Conjugation | Unconjugated |
| Physical Appearance | Liquid |
| Storage Buffer | 50 mM Tris-HCl (pH 7.5), 200 mM NaCl, 20% glycerol, 1 mM DTT |
| Stability & Storage | -80℃ |
Guidelines
Please use rapid thawing with running water to thaw the protein samples.
For complete recovery, mix well and spin before use.
Product must not be stored in diluted solutions.
Aliquots below 10μl are not advisable.
Avoid repetitive freeze-thaw cycles!
For complete recovery, mix well and spin before use.
Product must not be stored in diluted solutions.
Aliquots below 10μl are not advisable.
Avoid repetitive freeze-thaw cycles!
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 876 reviews
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Product Reviews
★★★★★ 5
Works great
Size: 60 Count (Pack of 1)
Great Stuff
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 15, 2026
★★★★★ 5
2 mg perfect for me
Size: 60 Count (Pack of 1)
Easier to low dose
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Reviewed in the United States on April 12, 2026
★★★★★ 4
Good product
Size: 60 Count (Pack of 1)
Good product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 22, 2025
★★★★★ 5
Usual,y. Helps me sleepme sle
Size: 60 Count (Pack of 1)
Works for me. Helps me have a restful sleep
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2026
★★★★★ 5
It works!
Size: 60 Count (Pack of 1)
Life Extension melatonin seems to work well. I’ve found that 1mg is as effective as the 3mg doses of other brands. I take 1mg every evening, as so does my German Shepherd. It helps us sleep through the night. We chose this brand because it’s clean and simple.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 17, 2025