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DUO94003 Sigma-Aldrich

Duolink® flowPLA Detection Kit - Orange

Duolink® PLA kit for Flow Cytometry with Orange Detection



Related Categories Duolink PLA Technology, Duolink flowPLA Detection Kits, Molecular Biology, Protein Interaction, Proteomics More...
application(s)   flow cytometry: suitable
  immunofluorescence: suitable
  proximity ligation assay: suitable
fluorescence   λex 554 nm; λem 576 nm (Cyanine 3; Zeiss Filter set 20)
suitability   suitable for fluorescence
shipped in   dry ice
storage temp.   −20°C



This product is comprised of the following:
• 5x Detection Solution - Orange (DUO84003)
• 5x Ligation Buffer (DUO82009)
• 5x Amplification Buffer (DUO82050)
• Ligase (1U/μL)
• Polymerase (10U/μL)

See datasheet for more information.

Features and Benefits

• Analyze protein protein interactions with flow cytometry readout
• Analyze cell populations with Proximity Ligation Assay
• Increased sensitivity due to rolling circle amplification for low abundant targets
• No overexpression or genetic manipulation required
• Relative quantification possible
• Works with any flow cytometer instrumentation
• Easy to follow flexible protocol
• Publication-ready results


Orange Fluorescence Detection Reagents
Use appropriate laser for λex 554 nm excitation
Use appropriate filter for λem 576 nm emission


Based on proximity ligation assay (PLA), the Duolink® PLA Technology allows for endogenous detection of protein interactions, post-translational modifications, and protein expression levels at the single molecule level in fixed cells.

Duolink® flowPLA Detection Kits will enable sensitive detection of proteins, protein-protein interactions, and protein modifications within cell populations by flow cytometry. To perform a Duolink® flowPLA experiment, you will need fixed, suspended cells, two primary antibodies that specifically recognize your proteins of interest, a pair of PLA probes (one PLUS and one MINUS), wash buffer, and a Duolink® flowPLA Detection Kit. The flowPLA Kits are available with 4 different fluorophores: Red, Green, Orange, or FarRed. The flowPLA Kits contain all the necessary reagents to perform the amplification and detection of bound PLA probes by flow cytometry. Analysis is carried out using standard flow cytometry assay equipment. User must provide a fixed cell suspension, primary antibodies, and corresponding PLA Probes.

Follow the Duolink® PLA Flow Cytometry Protocol to use this product.

Visit our Duolink® PLA Flow Cytometry page on how to run a Duolink® flow experiment, applications, troubleshooting, and more.

Application Note

Primary antibodies are needed. Test your primary antibodies (IgG-class, mono- or polyclonal) in a standard immunofluorescence (IF), immunohistochemistry (IHC), or immunocytochemistry (ICC) assay to determine the optimal fixation, blocking, and titer conditions. Flow validated antibodies are recommended.

Let us do the work for you, learn more about our Custom Service Program to accelerate your Duolink® projects

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Legal Information

Duolink is a registered trademark of Sigma-Aldrich Co. LLC

Safety & Documentation

Safety Information

NONH for all modes of transport

Custom Duolink Services
Protocols & Articles


Duolink® PLA Flow Cytometry Kits

Traditional flow cytometry has been limited in the ability to detect protein-protein interactions and low abundant proteins events — until now. We have combined Duolink® Proximity Ligation Assay (PLA...
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How to Optimize Duolink® PLA for Flow Cytometry Detection

Adaptation of Duolink® in situ proximity ligation assay (PLA) into flow cytometry workflows allows quantitative detection of protein-protein interactions, protein post-translational modifications, an...
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The Power of Duolink® flowPLA Detection Kits in Studying Protein Interactions, Post-Translational Modifications, and Low-Abundant Protein Targets

Duolink® PLA technology has been used by researchers to study protein events via microscopy and more recently in flow cytometry experiments. This article describes the new possibilities that are avai...
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Troubleshooting Guide for Duolink® PLA for Flow Cytometry Detection

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Keywords: Amplification, Anticoagulants, Buffers, Centrifugation, Detection methods, Detergents, Flow cytometry, Gene expression, Immunofluorescence, Microscopy, Peptide synthesis, Titrations


Duolink® PLA Flow Cytometry Protocol

This protocol describes the use of Duolink® PLA reagents for the detection of individual proteins, protein modifications, and protein-protein interactions within cell populations by flow cytometry.
Keywords: Amplification, Centrifugation, Flow cytometry, Microscopy, Peptide synthesis

Related Content

Duolink® PLA - Protein Detection Technology

Inside every cell, there is a breakthrough waiting to be uncovered. The chance to change the origin of a human disease or discover the tell-tale sign of an irregular protein-protein interaction requi...
Keywords: Amplification, Genetic, Immunofluorescence, Individual protein Immunoprecipitation, Peptide synthesis, Post translational modifications, Protein complex immunoprecipitation, Western blot

Duolink® PLA Custom Services

Duolink® Proximity Ligation Assay (PLA) is a powerful tool that allows in situ detection of endogenous proteins, protein interactions, and protein modifications with high specificity and sensitivity....
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