$111.99Original price was: $111.99.$89.79Current price is: $89.79.
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P21 50mg is formulated for precise research applications. At Ultra Peps, we prioritize consistency, reliability, and research-focused handling standards.
Cellular regulation and cellular stress response research
DNA pathways, developmental biology, and neurobiological signaling
Trusted research supplier
Fast order processing
Reconstitution Required: This product recommends Reconstitution solution Add Reconstitution Solution
P21 50mg, also known as Cyclin-Dependent Kinase Inhibitor 1 (CDK-interacting protein 1), plays an important role in regulating cell-cycle progression, gene expression, and cellular stress responses. Additionally, researchers study P21 in laboratory models involving DNA maintenance, cellular adaptation, developmental biology, and neurobiological signaling pathways.
Due to its role as a key regulatory protein, P21 continues to attract scientific interest in studies involving cell-cycle control, transcriptional regulation, and molecular communication networks. Furthermore, researchers frequently utilize P21 to investigate how cells coordinate growth, replication, and responses to environmental stressors. As a result, P21 remains a valuable research target in cellular and molecular biology.
Mode of Action
P21 functions as a cyclin-dependent kinase (CDK) inhibitor that regulates cell-cycle progression through direct interaction with cyclin-CDK complexes. Upon activation, P21 binds to cyclin-CDK complexes involved in the G1 and S phases of the cell cycle, preventing kinase activity and slowing progression through critical cell-cycle checkpoints. As a result, cells gain additional time to coordinate DNA maintenance, transcriptional regulation, and other regulatory processes before replication proceeds.
Furthermore, P21 operates as a downstream effector of the tumor suppressor protein p53, which becomes activated in response to cellular stress and DNA damage. Consequently, increased P21 expression initiates signaling pathways associated with cell-cycle arrest, DNA repair coordination, and cellular adaptation mechanisms. Because P21 serves as a central regulator of cyclin-dependent kinase activity, it plays a critical role in controlling cellular proliferation, checkpoint signaling, and gene-regulatory communication networks.
Semax is frequently studied in laboratory models involving neurobiological signaling, neuronal communication, and molecular pathway regulation. Researchers often compare Semax and P21 when investigating cellular signaling within the nervous system.
Researchers often study Epithalon alongside P21 in laboratory investigations involving cellular regulation, gene expression, and biological signaling pathways.
This designation allows the use of research chemicals and peptides strictly for in vitro testing and research. It is to be handled by qualified and licensed professionals, in laboratory settings only.
Bodily introduction of any kind, into humans or animals, is strictly illegal by law.This product is NOT for human use and can be harmful if ingested. This product is not in a sterile solution. It is not a drug, food, or cosmetic.
Peptides should be stored properly to maintain their stability and effectiveness. Here are some general guidelines for storing peptides:
1. Lyophilized (Dry/Powder) Peptides:
Storage Temperature: Store at -20°C or -80°C. Lyophilized peptides are typically more stable at lower temperatures.
Avoid Moisture: Keep them in airtight containers to avoid moisture exposure, which can degrade peptides.
Expiration: Lyophilized peptides generally have a longer shelf life when stored properly (up to a year or more).
2. Reconstituted Peptides (in Solution):
Storage Temperature: If you’ve dissolved a peptide in a solvent (e.g., water, acetic acid, or another buffer), you should store it at 2–8°C (36–46°F)
Protect from Light: Peptides in solution can degrade when exposed to light, so store them in amber-colored vials or protect them from light using foil or opaque containers.
Stability: Once reconstituted, peptides are typically stable for a few days to a few weeks at 4°C, depending on the sequence and conditions, but freezing is often the safest option for long-term storage.
3. Special Considerations:
Buffer Choice: Ensure the peptide is dissolved in an appropriate buffer to maintain stability. Some peptides may degrade in certain solvents, so it’s essential to choose the right one.
Avoid Contamination: Always handle peptides with clean equipment (e.g., sterile vials, pipettes) to prevent contamination that could affect their stability.
Property
Value
Chemical Name
P21 / P021 / Ac-DGGLAG-NH2
Molecular Formula
C₃₀H₅₄N₆O₅
Molecular Weight
578.3 g/mol
Sequence
Ac-Asp-Gly-Gly-Leu-Adamantylglycine-NH2
THIS PRODUCT IS FOR RESEARCH ONLY
This designation allows the use of research chemicals and peptides strictly for in vitro testing and research. It is to be handled by qualified and licensed professionals, in laboratory settings only.
Bodily introduction of any kind, into humans or animals, is strictly illegal by law.This product is NOT for human use and can be harmful if ingested. This product is not in a sterile solution. It is not a drug, food, or cosmetic.
Each unit is prepared with attention to consistency. Packaging is sealed and reinforced to protect shipment integrity. In addition, we offer Protection Coverage at checkout as an additional option which covers lost or damaged packages ($3.99). We’ll re-ship or refund eligible orders once confirmed. For additional information please visit our Shipping Policy and tracking Info Page
We ship USPS Priority only
Ships same day M-F (before 4pm est cutoff)
Orders placed on a Federal holiday or weekend will be delivered on the next business day
Free shipping on orders over $150. This offer will be available based on post-discount order amount
Signature confirmation is offered at checkout for $19.99
Yes, we ship to PO Boxes
Tracking & Insurance (up to $100 via USPS) is included
Property
Value
Chemical Name
P21 / P021 / Ac-DGGLAG-NH2
Molecular Formula
C₃₀H₅₄N₆O₅
Molecular Weight
578.3 g/mol
Sequence
Ac-Asp-Gly-Gly-Leu-Adamantylglycine-NH2
THIS PRODUCT IS FOR RESEARCH ONLY
This designation allows the use of research chemicals and peptides strictly for in vitro testing and research. It is to be handled by qualified and licensed professionals, in laboratory settings only.
Bodily introduction of any kind, into humans or animals, is strictly illegal by law.This product is NOT for human use and can be harmful if ingested. This product is not in a sterile solution. It is not a drug, food, or cosmetic.
$38.99–$157.99Price range: $38.99 through $157.99Select options
This product has multiple variants. The options may be chosen on the product page
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Ultra Peps Legal Disclaimer
I. RESEARCH USE ONLY: Products are sold strictly for laboratory research and in-vitro testing, not for human or animal use. II. ASSUMPTION OF RISK: You assume all risk associated with these chemicals. III. LIABILITY: You agree to indemnify BCUltra LLC for any misuse, including human consumption. IV. COMPLIANCE: You certify you are 21+ & will handle these peptides & chems per all applicable law.
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P21 50mg
$111.99Original price was: $111.99.$89.79Current price is: $89.79.P21 50mg is formulated for precise research applications. At Ultra Peps, we prioritize consistency, reliability, and research-focused handling standards.
Description
P21 50mg, also known as Cyclin-Dependent Kinase Inhibitor 1 (CDK-interacting protein 1), plays an important role in regulating cell-cycle progression, gene expression, and cellular stress responses. Additionally, researchers study P21 in laboratory models involving DNA maintenance, cellular adaptation, developmental biology, and neurobiological signaling pathways.
Due to its role as a key regulatory protein, P21 continues to attract scientific interest in studies involving cell-cycle control, transcriptional regulation, and molecular communication networks. Furthermore, researchers frequently utilize P21 to investigate how cells coordinate growth, replication, and responses to environmental stressors. As a result, P21 remains a valuable research target in cellular and molecular biology.
Mode of Action
P21 functions as a cyclin-dependent kinase (CDK) inhibitor that regulates cell-cycle progression through direct interaction with cyclin-CDK complexes. Upon activation, P21 binds to cyclin-CDK complexes involved in the G1 and S phases of the cell cycle, preventing kinase activity and slowing progression through critical cell-cycle checkpoints. As a result, cells gain additional time to coordinate DNA maintenance, transcriptional regulation, and other regulatory processes before replication proceeds.
Furthermore, P21 operates as a downstream effector of the tumor suppressor protein p53, which becomes activated in response to cellular stress and DNA damage. Consequently, increased P21 expression initiates signaling pathways associated with cell-cycle arrest, DNA repair coordination, and cellular adaptation mechanisms. Because P21 serves as a central regulator of cyclin-dependent kinase activity, it plays a critical role in controlling cellular proliferation, checkpoint signaling, and gene-regulatory communication networks.
Research Applications
This compound is commonly used in:
• Controlled laboratory analysis
• Cell-cycle regulation research
• DNA damage response investigations
• Gene expression studies
• Cellular senescence research
• Neurobiological pathway research
• Analytical and pharmacological research
Related Research Compounds
Semax
Semax is frequently studied in laboratory models involving neurobiological signaling, neuronal communication, and molecular pathway regulation. Researchers often compare Semax and P21 when investigating cellular signaling within the nervous system.
Selank
Selank is commonly examined in studies involving neuropeptide signaling, neurotransmitter activity, and central nervous system communication pathways.
DSIP
DSIP is frequently investigated in research involving neuroendocrine signaling, biological regulation, and peptide-mediated communication mechanisms.
Epithalon
Researchers often study Epithalon alongside P21 in laboratory investigations involving cellular regulation, gene expression, and biological signaling pathways.
ARA-290
ARA-290 is commonly examined in research involving cellular communication, signaling networks, and biological adaptation mechanisms.
Selected Literature
Read our Blog: Unlocking the Brain: Neurological, Cognitive & Stress-Related Peptides
Read our Blog: What Peptides Do in the Body: Understanding Their Role in Biological Research
Read our Blog: Understanding Peptide Half-Life in Research: Stability, Signaling, and Duration
Chemical Details
THIS PRODUCT IS FOR RESEARCH ONLY
This designation allows the use of research chemicals and peptides strictly for in vitro testing and research. It is to be handled by qualified and licensed professionals, in laboratory settings only.
Bodily introduction of any kind, into humans or animals, is strictly illegal by law.This product is NOT for human use and can be harmful if ingested. This product is not in a sterile solution. It is not a drug, food, or cosmetic.
Please read our Terms and Conditions prior to ordering.
Additional information
Solid (Powder)
White
50mg
cyclin-dependent kinase inhibitor 1
Research Peptide
Ultra Peps
Peptides should be stored properly to maintain their stability and effectiveness. Here are some general guidelines for storing peptides:
1. Lyophilized (Dry/Powder) Peptides:
Storage Temperature: Store at -20°C or -80°C. Lyophilized peptides are typically more stable at lower temperatures.
Avoid Moisture: Keep them in airtight containers to avoid moisture exposure, which can degrade peptides.
Expiration: Lyophilized peptides generally have a longer shelf life when stored properly (up to a year or more).
2. Reconstituted Peptides (in Solution):
Storage Temperature: If you’ve dissolved a peptide in a solvent (e.g., water, acetic acid, or another buffer), you should store it at 2–8°C (36–46°F)
Protect from Light: Peptides in solution can degrade when exposed to light, so store them in amber-colored vials or protect them from light using foil or opaque containers.
Stability: Once reconstituted, peptides are typically stable for a few days to a few weeks at 4°C, depending on the sequence and conditions, but freezing is often the safest option for long-term storage.
3. Special Considerations:
Buffer Choice: Ensure the peptide is dissolved in an appropriate buffer to maintain stability. Some peptides may degrade in certain solvents, so it’s essential to choose the right one.
Avoid Contamination: Always handle peptides with clean equipment (e.g., sterile vials, pipettes) to prevent contamination that could affect their stability.
THIS PRODUCT IS FOR RESEARCH ONLY
This designation allows the use of research chemicals and peptides strictly for in vitro testing and research. It is to be handled by qualified and licensed professionals, in laboratory settings only.
Bodily introduction of any kind, into humans or animals, is strictly illegal by law.This product is NOT for human use and can be harmful if ingested. This product is not in a sterile solution. It is not a drug, food, or cosmetic.
Please read our Terms and Conditions prior to ordering.
Each unit is prepared with attention to consistency. Packaging is sealed and reinforced to protect shipment integrity. In addition, we offer Protection Coverage at checkout as an additional option which covers lost or damaged packages ($3.99). We’ll re-ship or refund eligible orders once confirmed. For additional information please visit our Shipping Policy and tracking Info Page
THIS PRODUCT IS FOR RESEARCH ONLY
This designation allows the use of research chemicals and peptides strictly for in vitro testing and research. It is to be handled by qualified and licensed professionals, in laboratory settings only.
Bodily introduction of any kind, into humans or animals, is strictly illegal by law.This product is NOT for human use and can be harmful if ingested. This product is not in a sterile solution. It is not a drug, food, or cosmetic.
Please read our Terms and Conditions prior to ordering.
Certificate of Analysis
View the Certificate of Analysis for this batch, provided by our testing lab.
Download COA (PDF)
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