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Results (689)

How do the Phospho-Tyrosine Mouse mAb (P-Tyr-100) #9411 and the Phospho-Tyrosine (P-Tyr-1000) MultiMab™ Rabbit mAb mix #8954 compare in terms of their sensitivity and specificity?

The Phospho-Tyrosine Mouse mAb (P-Tyr-100) #9411 is a mouse mAb from a single clone, whereas the Phospho-Tyrosine (P-Tyr-1000) MultiMab™ Rabbit mAb mix #8954 is a mix of rabbit mAb...

In terms of cytokine activity, what is the difference between International Units (IU) and specific activity?

International Units (IU) and specific activity are two differe...

What is the best way to choose an antibody for my CUT&RUN assay if I cannot find a CUT&RUN validated antibody for my target protein?

When selecting an antibody for use in CUT&RUN, we recommend starting with a ChIP or ChIP-seq-validated antibody; however, we have found that not all ChIP-validated antibodie...

Which cleaved caspase-3 (Asp175) antibody do you suggest for paraffin-embedded immunohistochemistry (IHC-P) with human samples?

We have several antibodies for detecting caspase-3 when cleaved at Asp175 that are validated for IHC-P with human samples. These are:

  • Cleaved Caspase-3 (Asp175) Antibody #9...

    Why do I need to use the three buffers in the Cell Fractionation Kit #9038?

    Each buffer in the Cell Fractionation Kit #9038 contains detergents to help isolate different cellular fractions. The Cytoplasmic Isolation Buffer (CIB) contains a non-ionic deterg...

    My items say to store at -20°c but they were shipped in an envelope. Is it ok to use?

    Yes, it is safe to use these items. Since 2003, CST has been shipping antibodies at room temperature when possible to reduce waste from packing materials. All CST antibodies are st...

    How should I resuspend and aliquot the PTMScan® LysC Protease #84748?

    To resuspend the PTMScan® LysC Protease #84748, we recommend allowing the vial to equilibrate at room temperature for a few minutes after removing from the -20C freezer. Next, ...

    I don’t see my target of interest in your menu of available antibodies for SignalStar™ Multiplex IHC. Can I still use it in my panel in some way?

    SignalStar Multiplex IHC kits and reagents haven’t yet been validated for use with antibodies outside of our menu. We’re in the proces...

    Can I use primers from the Illumina Nextera Library preparation system or design my own primers to amplify the DNA library generated from the CUT&Tag Assay Kit #77552??

    Yes, you can use primers from the Illumina Nextera Library preparation system or self-designed primers to amplify the DNA library generated from the CUT&Tag DNA using the CUT&a...

    Do you have mouse-reactive antibodies available for SignalStar™ Multiplex IHC?

    Yes, please select “Mouse” in the first step of the SignalStar Multiplex IH...

    How are the SignalStar™ Multiplex IHC Kits & Reagents validated?

    CST thoroughly validates each antibody available in the

    Can I combine antibodies used in a SignalStar™ assay with direct conjugates?

    SignalStar Multiplex IHC kits and reagents have been validated for use in combination with direct conjugates. The SignalStar™ Fluorescence Removal Kit 

    How stable is the Senescence β-Galactosidase Staining Kit #9860 after multiple freeze/thaws?

    We are confident that the Senescence β-Galactosidase Staining Kit #9860 will continue to perform as expected up to at least 3 freeze/thaw cycles. We recommend aliquoting your reage...

    Can you provide data that confirms the specificity of your Raptor (24C12) Rabbit mAb #2280?

    The specificity of our Raptor (24C12) Rabbit mAb #2280 has been confirmed by siRNA in the following papers:

    PMID: 28648777 (https://pubmed.ncbi.nlm.nih.gov/28648777/) Figure...

    Is PTMScan® compatible with SILAC?

    PTMScan® is compatible with the use of stable isotope labeling using amino acids in cell culture, or SILAC. The incorporation of heavy stable iso...

    Can I modify the CST-recommended protocol for a given application?

    CST antibodies undergo thorough validation processes to ensure reliable performance for every approved application. This includes testing different protocol variations to identify ...

    What is an appropriate positive control to include in this SignalStar™ assay? Are multiple controls necessary?

    Any tissue shown to be positive for each marker via chromogenic IHC can serve as a positive control tissue for a SignalStar™ assay. Each target will therefore require a positive co...

    Do I need to optimize the SignalStar™ Multiplex IHC Kits & Reagents for the type of tissue I’m using?

    The SignalStar Multiplex IHC kits and reagents have been optimized with respect to fluorophore pairing and order of antibodies. As tissues vary in quality and expression level of b...

    How long after the completion of staining can I wait to image my slides when performing a SignalStar™ Multiplex IHC assay?

    For Imaging Round 1, the staining should show robust signal when imaged up to 8 hours post completion of staining. For Imaging Round 2, imaging should be performed as close to the ...

    Which β-actin antibody do you suggest for immunofluorescence-immunocytochemistry (IF-IC) in human samples?

    We have several antibodies for detecting β-actin that are validated for IF-IC with human samples. These include: 

    • β-Actin (13E5) Rabbit mAb #4970
    • β-Actin...

      What is the extinction coefficient of my rabbit antibody?

      The molar extinction coefficient of rabbit IgG at 280 nm is approximately 210,000 M-1cm-1.

      How does the specificity of the F(ab’)2 fragments differ from the corresponding full-length monoclonal antibodies?

      Since the paratopes of the antibody fragments are identical to that of the corresponding full-length monoclonal antibodies, their specificity for scFv linkers remains unchang...

      When comparing my SignalStar™ staining to the chromogenic staining on a serial section, I see more positive cells. How do I know if this excess staining is correct?

      During the course of optimization, we’ve found that fluorescent staining may show higher %-positivity than chromogenic staining. To ensure any excess staining is specific, confirm ...

      Can I order a custom formulation of an antibody?

      For custom (carrier-free) orders, many antibodies are available pre-formulated in PBS without BSA or glycerol. This carrier-free formulation is amenable to conjugation and can be c...

      Which nuclear dyes can be used for In-Cell Western assays in combination with DyLight 680-conjugated secondary antibodies?

      When performing In-Cell Western assays with DyLight 680-conjugated secondary antibodies, we recommend using either Hoechst 33342 or DAPI as a nuclear dye. DRAQ5 cannot be used beca...

      Do you have human-reactive antibodies available for SignalStar™ Multiplex IHC?

      Yes, please select “Human” in the first step of the SignalStar Multiplex IH...

      Can I autoclave the 6-Tube Magnetic Separation Rack #7017?

      No, these racks cannot be autoclaved. Exposing them to high autoclave temperatures may cause the magnets to lose their magnetism. Instead, we suggest submerging or spraying the ...

      Which phospho-Akt (Ser473) antibody do you suggest for Immunofluorescence (Immunocytochemistry) (IF-IC) with human samples?

      We have several antibodies for detecting the phosphorylation of Akt at Ser 473 that are validated for IF-IC with human samples. These include the following: