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Map the living interactome with precision. Our proximity-dependent biotinylation services capture transient protein interactions in their native cellular context.
10-minute labeling, biotin-based
Sub-minute labeling, biotin-phenol based
18-24 hr labeling, low background
Our intracellular biotinylation services enable precise mapping of protein-protein interactions within the native cellular environment
From 10-minute TurboID labeling to sub-minute APEX2 snapshots, capture dynamic protein interactions at the exact moment they occur.
10-20 nm labeling radius ensures only proteins in immediate proximity to your target are captured, providing high-fidelity interaction maps.
Actual labeling radius varies by enzyme system and experimental conditions.
Labeling occurs in living cells before lysis, preserving weak and transient interactions that don't survive traditional co-immunoprecipitation.
Our experts are ready to help design your proximity labeling experiment.
Multiple enzymatic systems optimized for different experimental requirements
Engineered biotin ligase with 10-minute labeling kinetics. Ideal for dynamic interaction studies with good spatial resolution.
Standard protocols range from 10 to 60 minutes depending on sample type.
Engineered ascorbate peroxidase enabling sub-minute labeling. Perfect for capturing very transient interactions.
Bacterial biotin ligase with 18-24 hr labeling. Best for weak interactors and low-abundance targets.
Comprehensive parameters for proximity labeling experiments
| Parameter | Specification |
|---|---|
| Labeling Systems | TurboID, miniTurboID, APEX2, BioID, split-TurboID |
| Labeling Time | 1 min (APEX2) to 24 hr (BioID) |
| Labeling Radius | 10-20 nm depending on system |
| Subcellular Targeting | Nuclear, mitochondrial, ER, Golgi, plasma membrane, custom |
| Sample Types | Mammalian cells, yeast, bacteria, tissue samples |
| Analysis Platform | Orbitrap Fusion Lumos LC-MS/MS with TMT/LFQ quantitation options |
| Bioinformatics | GO analysis, KEGG pathway, PPI network, CRAPome contaminant filtering |
| Delivery Format | Raw data, processed results, interactive reports |
From experimental design to data analysis
Consultation on bait protein, labeling system selection, and control experiments
Fusion protein cloning, stable cell line generation, or virus production
Proximity labeling, cell lysis, streptavidin pull-down, on-bead digestion
LC-MS/MS analysis, bioinformatics processing, interactive report delivery
Versatile tool for spatial proteomics
Map direct and indirect protein-protein interactions in living cells
Profile protein composition of specific subcellular compartments
Capture dynamic signaling network changes upon stimulation
Identify novel protein targets and off-target interactions
Trusted by scientists worldwide
Principal Investigator
Leading Research University
The TurboID system provided excellent temporal resolution for our signaling pathway study. Captured dynamic interaction changes we couldn't see with traditional methods.
Postdoctoral Researcher
Major Research Institution
The subcellular targeting options allowed us to specifically profile the mitochondrial proteome. Excellent data quality and comprehensive bioinformatics support.
Based on peer-reviewed proximity labeling research
Shin S, Lee SY, Kang MG, et al. Communications Biology. 2024.
Novel method for systematic identification of biotinylation sites from proximity labeling for improved protein localization analysis.
Zhu Y, et al. Biochemistry and Biophysics Reports. 2024.
Development of improved immunoaffinity enrichment methods for biotinylated peptide analysis.
Common questions about proximity labeling services
Choose TurboID for dynamic studies requiring 10-minute time resolution. Choose APEX2 for sub-minute snapshots of very transient interactions. Choose BioID for weak interactors or when low background is critical.
We recommend expressing the bait fusion without the labeling enzyme as a negative control. We offer multiple control strategies, including spatial-specific negative controls (e.g., untargeted ligase) to minimize false positives. For quantitative studies, we offer bioluminescent or isotopic labeling controls.
Yes. We offer subcellular targeting with signal sequences for nucleus, mitochondria, ER, Golgi, peroxisomes, and plasma membrane. Custom targeting sequences can also be incorporated.
Standard analysis includes GO enrichment, KEGG pathway analysis, protein interaction network visualization, CRAPome contaminant filtering, and comparative analysis with controls. Premium tier includes custom analysis pipelines.
Get a customized quote for your Intracellular Protein Biotinylation Services project. Our experts will respond within 24 hours.
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