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Trusted by Leading Research & Pharma Institutions

Chemical Biotinylation Service

Precision chemical biotinylation for proteins, antibodies, and biomolecules. Site-specific labeling with high reproducibility and retention of biological activity using proven conjugation chemistries.

3-7 DOL Range
HPLC Verified
µg to Gram Scale
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Trusted by leading research and pharmaceutical institutions

Harvard
Pfizer
MIT
Roche
Stanford
Novartis

Why Choose Us

NHS-ester, maleimide, hydrazide chemistries
Activity preservation optimization
HPLC, LC-MS, UV-Vis verification
µg to multi-gram scale production

Proven Chemistry

NHS-ester, maleimide, hydrazide

Activity Preserved

Optimized to retain protein function

Rigorous QC

HPLC, LC-MS, UV-Vis verified

Market CAGR
12.4%
Overview Technology Specifications Workflow Applications FAQ
Service Overview

Why Choose Our Chemical Biotinylation Service?

Our chemical biotinylation service delivers high-quality biotinylated biomolecules using proven conjugation chemistry. Whether you need amine-specific, thiol-specific, or site-directed labeling, we optimize conditions to preserve protein function while achieving consistent results.

Proven Chemistry

NHS-ester, maleimide, and hydrazide chemistries optimized for different functional groups and applications. Each method targets distinct functional groups on your biomolecule.

  • NHS-Ester: primary amines (lysine, N-termini)
  • Maleimide: sulfhydryl groups (cysteine)
  • Hydrazide: carbonyl groups (carbohydrates)

Activity Preserved

Careful optimization ensures your biotinylated proteins retain biological activity throughout the labeling process. PEG spacer options reduce steric hindrance.

  • Careful reaction condition optimization
  • PEG spacer options for accessibility
  • Activity testing available on request

Rigorous QC

Every batch verified by HPLC, LC-MS, and UV-Vis analysis. Full documentation included with each order.

DOL Verification

Degree of labeling confirmed by HABA assay and SDS-PAGE shift analysis.

Scalable Production

From microgram to multi-gram scale. Consistent lot-to-lot reproducibility.

Ready to Accelerate Your Research?

Get a customized quote for your biotinylation project.

Technology Platform

Our Biotinylation Chemistry

Multiple biotinylation chemistries to match your specific requirements.

NHS-Ester

Targets primary amines on lysine residues and N-termini. Best for general protein and antibody labeling.

pH 7.5-8.5 30 min-2 hr

Maleimide

Targets sulfhydryl groups on cysteine residues. Site-specific labeling away from active sites.

pH 6.5-7.5 1-2 hr RT

Hydrazide

Targets carbonyl groups on oxidized carbohydrates. Ideal for glycoprotein labeling.

pH 4-6 2-4 hr RT

Sulfo-NHS

Water-soluble, membrane-impermeable. Selective for cell surface primary amines.

pH 7.5-8.5 30 min ice

PEG Spacer Options

Various linker lengths to reduce steric hindrance and improve streptavidin accessibility:

NHS-LC-Biotin
22.4 Å spacer
NHS-PEG4-Biotin
29 Å spacer
NHS-PEG12-Biotin
56 Å spacer
NHS-SS-Biotin
Cleavable disulfide
Specifications

Service Specifications

Complete specifications for our chemical biotinylation service.

Parameter Labeling Parameters Quality Control
Sample Scale 100 µg to 5 mg Standard batches
Production Scale µg to multi-gram Custom batches
Degree of Labeling 3-7 biotins/molecule HABA assay, SDS-PAGE
Buffer Compatibility PBS, HEPES, carbonate Custom buffers available
Analytical Methods HPLC, LC-MS, UV-Vis Every batch verified
Purity ≥90% by HPLC CoA included

Purification Options

Desalted, Lyophilized, or Solution

Packaging

Single tubes, 96-well plates, or bulk

Documentation

CoA, MS Report, QC Summary

Workflow

Streamlined Process from Design to Delivery

Our proven 6-step workflow ensures quality and efficiency at every stage.

1

Consultation

Submit protein details, target DOL, and requirements

2

Optimization

Pilot scale to determine ideal conditions

3

Conjugation

Large-scale reaction under optimized conditions

4

Purification

Removal of excess reagent via desalting

5

QC Analysis

HPLC, LC-MS, UV-Vis verification

6

Delivery

Final product with CoA and QC data

Applications

Diverse Applications Across Biotechnology

Biotinylated biomolecules serve diverse research and diagnostic purposes.

Immunoassays

Biotinylated detection antibodies enable signal amplification with streptavidin-HRP conjugates in various immunoassay formats.

  • ELISA detection antibodies
  • Western blot analysis
  • Flow cytometry
  • Immunohistochemistry
90%+
Signal amplification

Protein Purification

One-step purification using streptavidin-coated magnetic beads or resin. Capture protein complexes with biotinylated baits.

  • Affinity purification
  • Pull-down assays
  • Oriented immobilization
  • Biosensor surfaces
1-Step
Purification process

Cell Imaging

Sulfo-NHS-biotin for selective labeling of cell surface proteins without membrane penetration. Track receptor internalization over time.

  • Surface labeling
  • Fluorescence microscopy
  • Protein trafficking
  • Subcellular localization
Non-Perm
Membrane impermeant

Protein Interaction Studies

Biotinylated proteins immobilized on streptavidin chips for binding kinetics. Real-time analysis of protein-protein interactions.

  • SPR analysis
  • Co-immunoprecipitation
  • Biolayer interferometry
  • Binding kinetics
Real-Time
Binding analysis
Testimonials

What Our Clients Say

Trusted by researchers worldwide for quality and reliability.

"The biotinylated antibodies showed excellent activity in our ELISA assays. Lot-to-lot consistency has been remarkable across multiple orders."

S
Senior Scientist
Immunodiagnostics Company

"Their technical team helped optimize labeling conditions for a challenging membrane protein. The PEG spacer option made a significant difference."

R
Research Director
Biotechnology Company

"We scale up production for clinical validation studies. Batch reproducibility and comprehensive documentation meet our regulatory requirements."

P
Principal Scientist
Pharmaceutical Company
Scientific Literature

Scientific Foundation

Our platform is backed by peer-reviewed research.

89 Citations

Biotin as a Reactive Handle to Selectively Label Proteins and DNA with Small Molecules

Cotton AD, Wells JA, Seiple IB. ACS Chemical Biology. 2022.

Development of BioReACT method for bioorthogonal labeling using biotin redox-activated chemistry.

View DOI
8 Citations

Improved elution strategy and new monoclonal anti-biotin antibody for LC-MS/MS characterization of protein biotinylation sites

Zhu Y. Biochemistry and Biophysics Reports. 2024.

Novel immunoaffinity enrichment strategy with high organic solvent for improved biotinylated peptide recovery.

View DOI
45 Citations

Thiol-Cleavable Biotin for Chemical and Enzymatic Biotinylation and Its Application to Mitochondrial TurboID Proteomics

Li H, Frankenfield AM, Houston R, et al. Journal of the American Society for Mass Spectrometry. 2022.

Thiol-cleavable biotin as an alternative elution method for streptavidin-coated magnetic beads.

View DOI
312 Citations

Site-specific biotinylation of purified proteins using BirA

Fairhead M, Howarth M. Methods in Molecular Biology. 2015.

Comprehensive review of enzymatic biotinylation using E. coli biotin ligase BirA for site-specific labeling.

View DOI
28 Citations

Two chromatographic schemes for protein purification involving the biotin/avidin interaction under native conditions

Raducanu VS, Tehseen M, et al. Journal of Chromatography A. 2020.

Novel purification strategies leveraging the biotin/avidin interaction while preserving binding affinity.

View DOI
FAQ

Frequently Asked Questions

Find answers to common questions about our service.

What biotinylation chemistry should I choose?
NHS-Ester is best for general protein and antibody labeling targeting lysine residues. Maleimide provides site-specific labeling on cysteine residues, ideal for avoiding active sites. Hydrazide targets oxidized carbohydrates on glycoproteins. Sulfo-NHS is water-soluble and membrane-impermeant, perfect for live cell surface labeling. Our technical team can recommend the optimal chemistry for your specific application.
How do you determine the degree of labeling?
Degree of labeling is verified using multiple methods: UV-Vis spectroscopy (A280/A280 ratio), HABA (4'-hydroxyazobenzene-2-carboxylic acid) assay, and SDS-PAGE mobility shift analysis. Every batch includes a detailed QC report with DOL confirmation. Target DOL is typically 3-7 biotins per molecule, adjustable based on your requirements.
Will biotinylation affect my protein's activity?
Our optimization process ensures minimal impact on protein function. We use mild reaction conditions, optimize biotin-to-protein ratios, and offer PEG spacer options to reduce steric hindrance. Optional activity testing is available to verify biological function post-labeling. Most proteins retain full activity when optimized appropriately.
What scales of production are available?
We offer scalable production from 100 µg to multi-gram scale. Standard service handles 100 µg to 5 mg batches. Larger scales are available through our production service with consistent lot-to-lot reproducibility. All scales undergo the same rigorous QC procedures to ensure quality consistency.
What quality control methods are used?
Every batch undergoes comprehensive QC: HPLC for purity analysis (≥90% purity), LC-MS for mass verification and site confirmation, UV-Vis spectroscopy for DOL determination, and optional SDS-PAGE shift analysis. Full documentation including Certificate of Analysis, MS report, and QC summary is included with every order.
How do PEG spacers improve biotinylation?
PEG spacers increase the distance between the biotin tag and your protein, reducing steric hindrance and improving streptavidin accessibility. Options range from 22.4 Å (NHS-LC-Biotin) to 56 Å (NHS-PEG12-Biotin). Longer spacers are recommended when biotinylation interferes with binding or activity. NHS-SS-Biotin provides a cleavable disulfide linker for reversible applications.
What purification forms are available?
We offer three purification forms: Desalted (salt removal via dialysis or desalting column), Lyophilized (freeze-dried powder, ideal for shipping and long-term storage), and Solution (ready-to-use in your buffer of choice, shipped cold). Custom packaging including single tubes, 96-well plates, and bulk containers is available.
What is the typical turnaround time?
Standard labeling projects: 5-10 business days. Rush service available for urgent projects. Pilot scale optimization may add 3-5 days for complex targets. Production-scale orders are quoted individually with dedicated timelines. Contact us for specific project timelines.

Ready to Get Started?

Send us your protein details and labeling requirements today.

Ready to Start Your Project?

Get a customized quote for your Chemical Biotinylation Services project. Our experts will respond within 24 hours.

No obligation
24h response
Expert consultation

Recommended Services

· Amine-Reactive Biotinylation Services
· Sulfhydryl-Reactive Biotinylation Services
· Carboxyl-Reactive Biotinylation Services

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