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Biotinylated Peptides

Biotinylated Peptides for Detection, Purification, and Molecular Interaction Studies

Biotinylated peptides are widely used research tools that combine the biological specificity of peptides with the strong affinity of biotin for streptavidin and avidin systems. These peptides enable highly sensitive detection, immobilization, and purification in a variety of biochemical and molecular biology applications. At Linkpeptide, we offer a comprehensive range of biotinylated peptides designed for applications in protein interaction studies, assay development, and bioanalytical workflows. With flexible labeling options and high-quality synthesis, our biotinylated peptides support reliable and reproducible research outcomes across multiple experimental platforms.

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BIM, Biotinylated

BIM, Biotinylated

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Biotin-ACTH (1-39), Human

Biotin-ACTH (1-39), Human

$1,885.00
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Biotin-ProTx-I

Biotin-ProTx-I

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Pam2CSK4 Biotin

Pam2CSK4 Biotin

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Pam3CSK4 Biotin

Pam3CSK4 Biotin

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ProTx-II-Biotin

ProTx-II-Biotin

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ZIP, Biotinylated

ZIP, Biotinylated

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What Are Biotinylated Peptides?

Biotinylated peptides are synthetic peptides conjugated with biotin (vitamin B7), a small molecule that binds with exceptionally high affinity to streptavidin and avidin proteins. This interaction is one of the strongest non-covalent biological interactions known, making biotin an ideal tag for detection and capture applications. By attaching biotin to a peptide sequence, researchers can:
  • Immobilize peptides on streptavidin-coated surfaces
  • Detect peptide interactions using labeled streptavidin
  • Isolate peptide-binding proteins through affinity purification
Key characteristics include:
  • Strong and specific biotin–streptavidin binding
  • High sensitivity in detection assays
  • Compatibility with a wide range of experimental systems
  • Flexible labeling positions (N-terminal, C-terminal, or internal)

Key Types of Biotinylated Peptides

This category includes several commonly used formats :

N-Terminal Biotinylated Peptides

Biotin is attached to the N-terminus of the peptide, which is often preferred when the peptide’s active region is located away from the N-terminal end. Key features:
  • Minimal interference with peptide activity
  • Simple and widely used labeling strategy
  • Suitable for most binding assays
Applications:
  • ELISA-based detection
  • Protein–peptide interaction studies
  • Surface immobilization assays

C-Terminal Biotinylated Peptides

Biotin is conjugated to the C-terminus of the peptide, providing an alternative orientation for binding or detection. Key features:
  • Preserves N-terminal functionality
  • Useful for directional immobilization
  • Enables orientation-specific studies
Applications:
  • Receptor binding assays
  • Structural and functional studies
  • Surface-based interaction analysis

Linker-Modified Biotinylated Peptides

These peptides incorporate a spacer (linker) between the peptide and biotin to improve accessibility and reduce steric hindrance. Key features:
  • Enhanced binding efficiency
  • Improved flexibility and accessibility
  • Reduced interference with peptide structure
Applications:
  • High-sensitivity detection assays
  • Complex protein interaction studies
  • Affinity purification workflows

Mechanism of Action in Biotin-Based Systems

Biotinylated peptides function through highly specific binding interactions: Biotin–Streptavidin Binding Biotin binds to streptavidin or avidin with extremely high affinity (Kd ≈ 10⁻¹⁵ M), enabling stable and reliable capture. Surface Immobilization Biotinylated peptides can be immobilized on streptavidin-coated plates, beads, or biosensor surfaces for assay development. Signal Detection Detection is achieved using labeled streptavidin (e.g., HRP, fluorescent dyes), allowing sensitive quantification. Affinity Purification Biotinylated peptides can be used to isolate interacting proteins or complexes via streptavidin-based pull-down methods.

Applications in Research and Assay Development

Biotinylated peptides are widely used across multiple research fields: Protein–Peptide Interaction Studies Used to identify and characterize binding partners in signaling pathways and molecular interactions. ELISA and Immunoassays Serve as capture or detection agents in highly sensitive assay systems. Affinity Purification Enable selective isolation of proteins or complexes from biological samples. Surface Plasmon Resonance (SPR) and Biosensors Immobilized biotinylated peptides are commonly used in biosensor-based interaction studies. Drug Discovery and Screening Facilitate high-throughput screening of peptide–protein interactions.

Advantages of Biotinylated Peptides

Compared to other labeling strategies:
  • Extremely high binding affinity
  • Stable and reproducible interactions
  • Versatility across multiple platforms
  • Non-radioactive and safe labeling method
  • Compatible with detection, purification, and immobilization
These advantages make biotinylated peptides indispensable tools in modern biochemical research.

Why Choose Linkpeptide Biotinylated Peptides

  • High purity peptides with verified biotin conjugation
  • Flexible labeling options (N-terminal, C-terminal, linker-modified)
  • Consistent batch quality for reproducible experiments
  • Custom peptide synthesis and modification services
  • Scalable production for research and industrial applications

Custom Biotinylated Peptide Services

At Linkpeptide, we provide tailored solutions for advanced research:
  • Custom biotin labeling strategies
  • Site-specific conjugation design
  • Linker optimization for improved performance
  • Dual-labeling and multi-functional peptide design
  • Scale-up synthesis for large-scale studies

FAQ

What are biotinylated peptides used for?

They are used for detection, immobilization, and purification of peptides and their interacting partners in biological systems.

Why is biotin commonly used as a label?

Biotin binds very strongly to streptavidin, enabling highly sensitive and stable detection systems.

What is the difference between N-terminal and C-terminal biotinylation?

It depends on where the biotin is attached, which can affect peptide orientation and activity in assays.

When should I use a linker in biotinylated peptides?

Linkers are useful when you need to improve accessibility or reduce steric hindrance in binding assays.

Can Linkpeptide provide custom biotinylated peptides?

Yes, we offer flexible labeling options, including site-specific biotinylation and linker design.
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