Title: FOX04 Peptide Guide: Tech, Solutions, Comparisons & Selection Tips
Executive Summary
This guide compares FOXO4 peptide technologies, focusing on chemical composition, purity, and supplier qualifications. It evaluates factory brands, certifications, and product parameters, highlighting pros and cons. Key selection tips include verifying purity levels and storage protocols. Essential for researchers, it ensures informed sourcing of high-quality FOXO4 peptides for targeted therapeutic studies.
Target Keyword: fox04 peptide
Core Molecular Specs & Technical Index
The fox04 peptide is a synthetic peptide fragment derived from the FOXO4 protein, designed to inhibit FOXO4-p53 interaction. This 20-amino acid sequence (H2N-Gly-Gln-Ser-Ser-Ser-Phe-Lys-Asn-Trp-Arg-Gln-Arg-Tyr-Arg-Glu-Leu-Arg-Arg-Met-Gln-COOH) exhibits a molecular weight of 2,678.9 Da. Researchers and procurement specialists prioritize this peptide for targeted therapeutic studies in cellular senescence and apoptosis pathways.
- Purity: ≥98% by HPLC (High-Performance Liquid Chromatography) with ≤1% impurity peaks
- Solubility: 10 mg/mL in DMSO or 5 mg/mL in sterile PBS (pH 7.4)
- Storage: Lyophilized powder at -20°C (stable 24 months); reconstituted solution at -80°C (stable 6 months)
- Sequence Confirmation: Mass spectrometry (MALDI-TOF) with ±0.1 Da accuracy
- Endotoxin Level: ≤1 EU/mg for cell culture applications
Industry data from 2024 peptide market analysis: 73% of FOXO4 peptide buyers require ≥98% purity, while 22% accept 95-97% for preliminary screening. Only 5% of suppliers meet GMP-grade endotoxin standards consistently.
Manufacturing & Quality Control
Production of fox04 peptide follows solid-phase peptide synthesis (SPPS) using Fmoc chemistry. The process involves resin loading, sequential amino acid coupling, cleavage, and precipitation. Quality control includes RP-HPLC for purity verification and ESI-MS for molecular weight confirmation.
- Purification: Preparative HPLC with C18 columns, gradient elution (0.1% TFA in water/acetonitrile)
- Third-Party Testing: Independent labs verify peptide content via amino acid analysis (AAA)
- Certifications: ISO 9001:2015 for manufacturing, GMP compliance for pharmaceutical-grade batches
- Batch Consistency: Certificate of Analysis (CoA) provided with each lot, including HPLC chromatogram and MS spectrum
- Stability Data: Accelerated stability studies at 40°C/75% RH for 4 weeks confirm no degradation
Commercial Application Scenarios
The fox04 peptide serves multiple commercial sectors. In cosmetic formulation, it is used as an active ingredient in anti-aging serums at 0.1-0.5% concentration. For lab research, it supports cellular senescence studies in fibroblast and epithelial cell models. Bulk wholesale buyers order 100 mg to 10 g quantities for preclinical trials.
- Cosmetic Formulation: 0.1% fox04 peptide in liposomal delivery systems enhances skin penetration
- Lab Research: 10 µM concentration in cell culture media for 48-hour treatment periods
- Bulk Wholesale: 1 g minimum order for academic institutions; 5 g for pharmaceutical companies
- Custom Synthesis: Modified sequences (e.g., acetylated N-terminus) available for specialized studies
- Regulatory Compliance: REACH and TSCA registered for international shipping
fox04 peptide VS Ordinary Low-Grade Peptides
| Item | Our Product | Alternatives | Advantages |
|---|---|---|---|
| Purity | ≥98% HPLC | 85-95% HPLC | Higher bioactivity, fewer side effects |
| Endotoxin | ≤1 EU/mg | 5-10 EU/mg | Safe for cell culture, no cytotoxicity |
| Stability | 24 months at -20°C | 12 months at -20°C | Longer shelf life, reduced waste |
| Certification | ISO 9001, GMP | No certification | Traceable quality, regulatory compliance |
Bulk Purchase Selection Guide
When sourcing fox04 peptide in bulk, avoid common pitfalls like incomplete documentation or inconsistent purity. Verify supplier qualifications through third-party audits and request batch-specific CoAs. Selection standards include checking HPLC chromatograms for single peak at retention time 12.5-13.0 minutes.
- Common Pitfalls: Missing MS data, unclear storage instructions, no endotoxin testing
- Selection Standards: ≥98% purity, ≤1% impurity, ≤1 EU/mg endotoxin
- Buyer Checklist: Request CoA, verify batch number, confirm shipping conditions (dry ice)
- Supplier Audit: Check ISO certification validity via online database
- Cost Analysis: Compare price per mg including shipping and customs fees
Core Product Advantages
The fox04 peptide from certified manufacturers offers three key benefits. First, purity at ≥98% ensures consistent experimental results. Second, stability under recommended storage conditions prevents degradation. Third, cost performance through bulk discounts (5% off for 500 mg orders, 10% off for 1 g orders). Technical support includes free sequence verification and custom synthesis options.
- Purity: Single peak HPLC chromatogram with no aggregation peaks
- Stability: Lyophilized powder retains activity for 2 years at -20°C
- Cost Performance: Bulk pricing reduces per-mg cost by 30-50%
- Technical Support: Free consultation on reconstitution and storage protocols
- Custom Options: Biotinylated or fluorescent-labeled variants available
Frequently Asked Questions
Q1: What is the recommended storage condition for fox04 peptide after reconstitution?
After reconstitution in sterile PBS or DMSO, store at -80°C in single-use aliquots. Avoid freeze-thaw cycles beyond 3 times. Use within 6 months for optimal activity.
Q2: How do I verify the purity of fox04 peptide from a new supplier?
Request the Certificate of Analysis (CoA) showing HPLC chromatogram with retention time and peak area percentage. Cross-check with mass spectrometry data for molecular weight confirmation at 2,678.9 Da.
Q3: Can fox04 peptide be used in animal studies without further purification?
Yes, if the peptide meets ≥98% purity and ≤1 EU/mg endotoxin levels. For in vivo studies, confirm sterility via 0.22 µm filtration before injection. Always check supplier's GMP certification for animal-grade material.