Blood Test Cyclic Citrullinated Peptide Purity Specifications Manufacturing Sourcing Guide

Introduction

The blood test cyclic citrullinated peptide (anti-CCP) is a critical biomarker peptide used extensively in autoimmune diagnostics and laboratory research. This synthetic peptide, derived from citrullinated protein sequences, enables highly specific detection of autoantibodies associated with rheumatoid arthritis. For B2B buyers—including diagnostic kit manufacturers, clinical laboratories, cosmetic R&D departments, and bulk peptide distributors—the purity, stability, and manufacturing consistency of this peptide directly impact assay reliability and commercial value. This guide provides comprehensive specifications, sourcing criteria, and quality benchmarks to support informed procurement decisions.

Core Molecular Specs & Technical Index

The blood test cyclic citrullinated peptide is a cyclic peptide containing citrulline residues, typically synthesized via solid-phase peptide synthesis (SPPS). Its molecular structure ensures high affinity for anti-CCP antibodies, making it indispensable for ELISA and chemiluminescence immunoassays.

Basic Properties

• Molecular Weight: Approximately 1,500–2,500 Da, depending on sequence length and cyclization method.
• Purity: ≥98% by HPLC, with ≤1% residual solvents and ≤0.5% free amino acids.
• Solubility: Fully soluble in water, PBS (pH 7.4), and DMSO at concentrations up to 10 mg/mL.
• Storage: Lyophilized powder stable at -20°C for 24 months; reconstituted solution stable at 4°C for 7 days.
• Appearance: White to off-white lyophilized powder, free of visible aggregates or discoloration.

Industry data indicates that peptide purity below 95% can reduce anti-CCP assay specificity by up to 12%, leading to false-positive rates in clinical diagnostics. Reliable sourcing of ≥98% pure cyclic citrullinated peptide is therefore non-negotiable for regulatory compliance.

Manufacturing & Quality Control

Production of the blood test cyclic citrullinated peptide follows a rigorous multi-step process to ensure batch-to-batch consistency and high immunoreactivity.

Production Process

• Solid-Phase Synthesis: Fmoc chemistry with orthogonal protection for citrulline and cysteine residues.
• Cyclization: Disulfide bond formation under controlled oxidation conditions (pH 8.0, 25°C, 4 hours).
• Purification: Preparative RP-HPLC with C18 columns, achieving >98% purity.
• Quality Control: Analytical HPLC, mass spectrometry (MALDI-TOF), and amino acid analysis.
• Third-Party Testing: ELISA validation against reference anti-CCP antibodies (sensitivity ≥95%, specificity ≥98%).

Certifications

• ISO 9001:2015 for quality management systems.
• GMP compliance for diagnostic raw materials.
• Certificate of Analysis (CoA) with batch-specific purity, solubility, and immunoreactivity data.
• MSDS and stability report for safe handling and storage.

Commercial Application Scenarios

The blood test cyclic citrullinated peptide serves diverse B2B applications, each requiring specific purity and formulation considerations.

Cosmetic Formulation

In anti-aging and skin barrier products, cyclic citrullinated peptides are used as active ingredients to support collagen synthesis and reduce inflammation. For cosmetic use, purity ≥95% is acceptable, with added stabilizers (e.g., trehalose) to enhance shelf life. Bulk orders typically range from 10 g to 100 g per batch.

Lab Research

Academic and pharmaceutical labs require ultra-pure (≥98%) peptide for antibody development, assay validation, and epitope mapping. Small-scale orders (1 mg–1 g) are common, with lyophilized aliquots to minimize freeze-thaw cycles.

Bulk Wholesale

Diagnostic kit manufacturers purchase in bulk (100 g–10 kg) for large-scale ELISA production. Here, consistent immunoreactivity and low endotoxin levels (<0.5 EU/mg) are critical. Custom cyclization and sequence modifications (e.g., biotinylation) are often requested.

Blood Test Cyclic Citrullinated Peptide VS Ordinary Low-Grade Peptides

Bulk Purchase Selection Guide

When sourcing blood test cyclic citrullinated peptide in bulk, avoid common pitfalls by following these standards.

Common Pitfalls

• Low Purity: Peptides with <95% purity may contain truncated sequences that cross-react with non-target antibodies.
• Incomplete Cyclization: Linear peptides have lower affinity and stability, reducing assay sensitivity.
• Poor Solubility: Aggregated peptides require additional solubilization steps, increasing lab time and waste.

Selection Standards

• Request a CoA with HPLC chromatogram and mass spec data.
• Verify cyclization efficiency via Ellman’s test or HPLC retention time shift.
• Confirm storage stability at -20°C for at least 24 months.

Buyer Checklist

• ☐ Purity ≥98% (HPLC)
• ☐ Endotoxin <0.5 EU/mg
• ☐ Batch-specific immunoreactivity data
• ☐ GMP or ISO certification
• ☐ Custom sequence modification capability

Core Product Advantages

Our blood test cyclic citrullinated peptide offers unmatched purity, stability, and cost performance for B2B buyers.

• High Purity: ≥98% by HPLC ensures minimal cross-reactivity and maximum assay specificity.
• Exceptional Stability: Lyophilized form retains >95% activity after 24 months at -20°C.
• Cost Performance: Bulk pricing from $50/g (100 g) to $30/g (10 kg), with volume discounts.
• Technical Support: Free batch-specific validation data and custom formulation assistance.

Frequently Asked Questions

Q1: What is the minimum purity required for blood test cyclic citrullinated peptide in diagnostic kits?
For diagnostic ELISA kits, purity must be ≥98% by HPLC to ensure specificity above 95%. Lower purity can lead to false positives and regulatory non-compliance.

Q2: How do you verify the cyclization of cyclic citrullinated peptide?
Cyclization is confirmed by HPLC retention time shift (cyclic vs. linear), mass spectrometry (molecular weight reduction of 2 Da per disulfide bond), and Ellman’s test for free thiol groups.

Q3: Can you provide custom sequences or modifications for bulk orders?
Yes, we offer custom synthesis including biotinylation, fluorescent labeling, and sequence optimization for specific assay requirements. Minimum order for custom peptides is 100 mg.