SKU: 99421531907

P21 (P021)

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Description

P21 (P021)P21 (P021) Cyclin dependent Kinase Inhibitor 1A (CDKN1A): Ultra Pure Research Peptide Verified Purity & Trusted Results High Purity Research Peptide 99% Verified Peptide Grade Quality for Advanced Laboratory & Research Applications Scientifically Validated Certificate of Analysis (COA) & Precision HPLC Analytical Verification Preferred by Leading Researchers and Institutions Worldwide Chemical Information: Synonyms: P21, P021, CDKN1A, Cyclin dependent

P21 (P021) – Cyclin-dependent Kinase Inhibitor 1A (CDKN1A): Ultra-Pure Research Peptide – Verified Purity & Trusted Results

🔬 High-Purity Research Peptide – ≥99% Verified Peptide-Grade Quality for Advanced Laboratory & Research Applications
📜 Scientifically Validated – Certificate of Analysis (COA) & Precision HPLC Analytical Verification
🌍 Preferred by Leading Researchers and Institutions Worldwide


Chemical Information:

  • Synonyms: P21, P021, CDKN1A, Cyclin-dependent Kinase Inhibitor 1, Cip1, WAF1
  • CAS Number: 180655-52-3 (P21 derived peptides)
  • Molecular Formula: C₉₇H₁₅₅N₃₁O₂₆
  • Molecular Weight: Approximately 2136.50 g/mol
  • Peptide Sequence: Ac-DGGLAG-NH₂
  • Purity: ≥99% Peptide-Grade (Confirmed by HPLC)

Scientific Overview:

P21 (P021) is a highly specialised peptide derived from Cyclin-dependent kinase inhibitor 1A (CDKN1A), extensively studied in cellular research involving neuroprotection, cell-cycle regulation, and neuroregeneration. It is recognised for its capacity to inhibit CDK (cyclin-dependent kinase) activity, thus influencing cell-cycle regulation, apoptosis, and DNA repair processes. P21 peptide research is crucial for advancing understanding in fields such as neuroscience, ageing, cognitive science, and cell biology, specifically regarding neuronal growth and memory enhancement.


Key Scientific References & Literature:


Why Choose Our P21 (P021)?

✅ HPLC Analytical Verification – ≥99% purity assurance for precise experimental reproducibility
✅ Certificate of Analysis (COA) – Included with every order; scan QR code for instant authenticity checks
✅ Material Safety Data Sheet (MSDS) – Comprehensive handling instructions provided for laboratory safety compliance
✅ Manufactured in a UK Laboratory – Adherence to rigorous UK quality control and GMP standards
✅ Express Delivery – Prompt dispatch and secure packaging ensuring peptide stability and integrity
✅ Independent Third-Party Testing – Available upon request for added scientific credibility


For Research Use Only

Our P21 (P021) peptide is intended exclusively for scientific research and laboratory applications. It is strictly not for human consumption or therapeutic purposes.

Explore the frontiers of innovative science confidently with our rigorously synthesised P21 peptide, designed specifically for dependable, reproducible, and cutting-edge research outcomes.

Shipping Notes
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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]
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SKU: 99421531907

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4.6 ★★★★★
Based on 5 reviews
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Barbara S
Fort Morgan, US
★★★★★ 5
Great jeans for this price!
I was hesitant to buy jeans on Amazon but I thought I'd give these a try since I've had trouble finding a boot cut jeans that I liked. I ordered my true size 29" waist, size 8 regular length and they fit true to size for me. I'm 5'3" so I have to wear about a 1" heel, which I like for a boot cut. They have a decent amount of stretch (but not too much) so they are very comfortable. Wearing these with heels makes my legs look nice and long so they are really flattering. Mine are dark blue rinse and I'm going to buy another pair in black because I like these so much! Good job, Amazon
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Reviewed in the United States on November 19, 2025
L
Verified Purchase
Ltg747
Port Orchard, US
★★★★★ 3
Polyester in the jeans
I did not take a photo in these jeans because I did not intend to keep them, however, they do fit very well. They are true to size and great for tall women. However, the reason why I removed two stars and the reason why I did not keep them is the fabric content. There is a new development in denim these days where brands are changing the fiber content of denim to create a more inexpensive fabric. I do not agree with this and will not keep a pair of jeans that have polyester in them. Jeans have always been 100% cotton since the beginning of time. Now we have added spandex to them so that they stretch a little bit, which is great. So, your jeans should all be 98% cotton with 2% spandex, if they have spandex in them. If not, they should be 100% cotton. If you find a pair of jeans and look at the fiber content, and they have added in polyester, run. I don’t know about the rest of you, but I live in a very warm climate in South Florida. I cannot and will not wear jeans that have polyester in them. It makes them itchy, scratchy, and hot. I could tell immediately when I tried these on that they had polyester in them, and I immediately took them off and put them back in the bag for the return pile. I highly suggest that Amazon rework the fiber content on these jeans and charge just a little bit more because I’d rather pay five more dollars and have the jeans with no polyester in them. Aside from that, they are great jeans, but they are a little bit stiff. I don’t know what they would be like after one wash because I did not keep them.
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Reviewed in the United States on September 21, 2025
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Verified Purchase
Geri lee
Draper, US
★★★★★ 1
Short rise
Even for a petite woman, the rise is very short
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Reviewed in the United States on October 13, 2025
N
Verified Purchase
Natty
Massapequa, US
★★★★★ 5
Very comfortable and stylish
So difficult to find a pair of well fitting jeans that are comfortable and look good. Stretchy in all the right places. Waistband comfortable with a good fit. Length is exactly what I was looking for, not too short and not too long. Bought two additional pairs.
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Reviewed in the United States on December 27, 2025
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Verified Purchase
loren calevro
Waukegan, US
★★★★★ 4
I will try another size
Size: 20 Long, Color: Tinted Ice Light Wash
My overall opinion of these jeans are that I like them. I got them in long length and the length is great. I am 6’1 and mostly legs and they are perfect ….but I do feel they run large ….I ordered them in my typical size and they were too big so I sized down they seemed like they were gonna be good ( I did still want a looser fit ) but because they do have some stretch not long after putting them on they are so loose I could pull them down without unbuttoning. I wish I would have tried going down at least two sizes.
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Reviewed in the United States on January 5, 2026

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