Custom Peptide Synthesis Services

About Biorunstar

Since 2015, Shenzhen Biorunstar Biotechnology Co., Ltd. has been a trusted provider of custom peptides, peptide modifications, and peptide-related products. We serve researchers globally from universities, laboratories, and biotech/pharmaceutical companies.

Our mission is to support scientific innovation with reliable, high-quality peptide synthesis services and products. With over 9 years of industry experience, we combine advanced technology with rigorous quality control to ensure every batch meets the highest standards.

9+

Years Experience

Global

Client Reach

SPPS/LPPS

Synthesis Platforms

Our Services

From custom synthesis to large-scale production, Biorunstar offers comprehensive peptide solutions with full analytical reporting and fast delivery.

Custom Peptide Synthesis

High-purity peptides synthesized using Fmoc/tBu or Boc/Benzyl strategies with HPLC and MS validation.

• SPPS & LPPS platforms
• Up to 100+ amino acids
• Purity: 70% to >98%
• HPLC & MS reports included

Peptide Modifications

Specialized modifications including biotinylation, phosphorylation, fluorophore labeling, and more.

• Biotin, FITC, DABCYL
• Cyclic, stapled, branched
• D-amino acids, methylation
• Isotope-labeled peptides

Peptide Library Synthesis

Comprehensive library services for epitope mapping, drug discovery, and functional screening.

• Alanine scanning
• Truncation & overlapping
• Positional scanning (1–3)
• Scrambled libraries

Large Scale Synthesis

Scalable production from milligrams to kilograms with consistent quality and documentation.

• GMP-ready processes
• Batch traceability
• Regulatory support
• Fast turnaround

Peptide Conjugation

KLH, BSA, or OVA conjugation for immunogen development and antibody production.

• Carrier protein coupling
• Site-specific conjugation
• Maleimide, NHS ester
• DBCO, azide chemistry

Peptide Nucleic Acid (PNA) Synthesis

Custom PNA oligomers with high binding affinity and nuclease resistance.

• Up to 20-mer standard
• Fluorescent labeling
• Scrambled controls
• HPLC purification

Featured Products

Explore our catalog of high-purity peptides, APIs, cosmetic peptides, and specialized reagents for research and development.

Semaglutide (CAS 910463-68-2)

Catalog: BRS04029

C187H291N45O59 | High-purity GLP-1 analog for diabetes and obesity research.

Tirzepatide (Lys20(N₃-CH₂CO-))

Catalog: BRSP1080

Dual GIP/GLP-1 receptor agonist with azide handle for conjugation.

Mazdutide (Lys20(N₃-CH₂CO-))

Catalog: BRSP1081

GLP-1/Glucagon dual agonist with clickable azide group.

Semaglutide Impurities

Degradation & process-related

Reference standards for QC and method validation.

FITC Peptides

Fluorescein-Labeled Peptides

Custom FITC conjugation

Ideal for flow cytometry, imaging, and binding assays.

Biotin Peptides

Biotinylated Peptides

Site-specific biotinylation

For ELISA, pull-down assays, and streptavidin binding.

FRET Peptides

Fluorophore-Quencher Pairs

FAM/DABCYL, EDANS/DABCYL

For protease activity and real-time enzyme assays.

ADC Linkers

Peptide Linkers for ADC

Cleavable & non-cleavable

Designed for antibody-drug conjugate development.

View Full Catalog

Why Choose Biorunstar?

9+ Years of Expertise in peptide chemistry and manufacturing.
Fully Automated SPPS with Fmoc/tBu and Boc/Benzyl strategies.
HPLC & MS Reports provided with every synthesis.
Fast Turnaround with global shipping and tracking.
Custom Packaging & Shipping with light-protected options for fluorophores.

>98%

Max Purity Available

100+

Amino Acids

24h

Response Time

Global

Shipping

Frequently Asked Questions

What is the typical turnaround time for custom peptide synthesis?

Standard synthesis takes 2–3 weeks depending on length and modifications. Expedited services are available upon request.

Do you provide analytical reports?

Yes, every peptide comes with HPLC and MS reports. Additional analyses (e.g., amino acid analysis, NMR) are available on request.

Can you synthesize peptides with D-amino acids?

Yes, we routinely incorporate D-amino acids at any position in the sequence.

What purity levels do you offer?

We offer purities from 70% up to >98%. Higher purity is achieved through preparative HPLC.

Do you offer GMP-grade peptides?

While our standard peptides are for research use, we can support GMP-compliant processes upon request for clinical development.

Get in Touch

Have a project or inquiry? Contact our team for a quote or technical consultation.

Email: [email protected]

Phone: +86-0755 2308 4243

Room 309, Meihua Building, Taiwan Industrial Park, No.2132 Songbai Road, Bao'an District, Shenzhen, China

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