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DUO92010 Sigma-Aldrich

Duolink In Situ Probemaker MINUS

  •  NACRES NA.32



Related Categories Duolink PLA Probes, Duolink PLA Technology, Molecular Biology, Protein Interaction, Proteomics More...
Quality Level   200
product line   Duolink
application(s)   immunofluorescence: suitable
  proximity ligation assay: suitable
suitability   suitable for brightfield
  suitable for fluorescence
shipped in   wet ice
storage temp.   −20°C



To perform a complete Duolink PLA in situ experiment you will need two primary antibodies (PLA, IHC, ICC or IF validated) that recognize two target epitopes. Other necessary reagents include a pair of PLA probes from different species (one PLUS and one MINUS), detection reagents, wash buffers, and mounting medium. Analysis is carried out using standard immunofluorescence assay equipment.HRP is also available for brightfield detection.

Duolink In Situ Probemaker extends your possibilities even further by allowing you to create your own PLA probes to meet specific assay requirements.
• Study homodimers
• Study protein-protein interactions with two primary antibodies derived from the same species
• Study protein-protein interactions with primary antibodies from any species

Using Duolink In Situ Probemaker PLUS and MINUS, you simply conjugate the PLUS and MINUS oligo arms directly to your antibodies in a quick and convenient procedure. As well as providing unique capabilities, this also means there is no longer any limitation as to which species your primary antibodies have to be derived from in order perform a Duolink In Situ assay.

Application Note
The antibody to be conjugated must have a concentration of 1 mg/ml. Do not use volumes larger than 20 ml for conjugation. The antibody must be in an amine free buffer, ideally PBS. The buffer should be carrier free but may contain up to 0.1% BSA, 5% trehalose, and 0.02% sodium azide.
• Study homodimers by using one monoclonal antibody split into two halves. Label one with the PLUS oligo and the other with the MINUS oligo.
• Use antibodies from same species: study protein-protein interactions, protein modifications, or single proteins, using two primary antibodies derived from the same species. Label one of the antibodies with the PLUS oligo and the other with the MINUS oligo
• Use antibodies from any species: study protein-protein interactions, protein modifications, or single proteins, using one or both primary antibodies derived from species other than mouse, rabbit or goat. Label one of your secondary antibodies with the PLUS oligo and the other with the MINUS oligo. Or, combine one labeled secondary antibody with a standard secondary Duolink In Situ PLA probe.

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. Duolink in situ reagents are suitable for use on fixed cells, cytospin cells, cells grown on slide, formalin-fixed, paraffin embedded (FFPE), or tissue (fresh or frozen). No minimum number of cells is required.

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

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Features and Benefits

• No overexpression or genetic manipulation required
• High specificity (fewer false positives)
• Single molecule sensitivity due to rolling circle amplification
• Relative quantification possible
• No special equipment needed
• Quicker and simpler than FRET
• Increased accuracy compared to co-IP
• Publication-ready results


This product is comprised of the following:
• Duolink In Situ oligonucleotide MINUS – one vial with lyophilized activated MINUS oligonucleotide for one conjugation of 20 μg antibody
• Conjugation buffer – buffer for conjugation reaction
• Stop reagent – stops conjugation reaction
• Storage solution – buffer for preserving prepared PLA probe (conjugated antibody)
• 20x Assay reagent – reagent to be added to experimenter optimized antibody diluent
• Blocking solution – blocks sample prior to staining with DuolinkIn Situ
• PLA probe diluent – buffer for diluting PLA probe (conjugated antibody) to final assay concentration
See datasheet for more information.

Other Notes

Duolinkproximity ligation assay(PLA®) allows for endogenous detection of protein interactions, post translational modifications, and protein expression levels at the single molecule level in fixed cells and tissue samples.

Follow the DuolinkIn Situ Probemaker Protocol to use the DuolinkIn Situ Probemaker PLUS and MINUS.This product can be applied to both the DuolinkIn Situ Fluorescence Protocol and the DuolinkIn Situ Brightfield Protocol depending on the detection reagents used.For more information, see Create Your Own (PLA®)Probes.

Visit our Duolink PLA Resource Center for information on how to run a Duolink experiment, applications, troubleshooting, and more.

Legal Information

Duolink is a trademark of Sigma-Aldrich Co. LLC

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

Safety & Documentation

Safety Information

NONH for all modes of transport
Protocols & Articles


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