ChIP requires formaldehyde crosslinking, sonication, overnight immunoprecipitation, and reversal of crosslinks before sequencing library preparation. CUT&RUN keeps nuclei intact and binds the antibody on ice. It then tethers pA-MNase to cut only antibody-bound DNA, which is released into the supernatant. CUT&RUN uses 10 to 100 times fewer cells, runs in a single day, and produces lower sequencing background.
Epigenetics Research Tools
ChIP Assay Kits, CUT&RUN Reagents and SNAP-ChIP Normalisation Panels
ChIP assay kits and CUT&RUN reagents for site-specific or genome-wide histone mark and transcription factor mapping
ChIP assay kits give you chromatin shearing, antibody capture, and DNA recovery in one optimised process, using magnetic bead pulldown.
Antibody-tethered micrococcal nuclease (MNase) methods such as CUT&RUN and CUT&Tag give you a no-sonication alternative to crosslinked ChIP. You can work from as few as 1,000 cells for histone marks, depending on the target and antibody; transcription factor profiling may require substantially more input material. These methods also give you lower background and sharper peak resolution. CUT&RUN workflows use Concanavalin A-conjugated paramagnetic beads to immobilise nuclei before antibody incubation and nuclease cleavage, and you can pair them with protease inhibitor tablets optimised for nuclei preparation.
Before you commit to a full ChIP or CUT&RUN run, pre-screen kits let you confirm antibody performance against native chromatin in under 90 minutes. For quantitative normalisation across samples, spike-in panels give you recombinant nucleosomes with defined modification states, which you add at a fixed quantity before immunoprecipitation to normalise pulldown efficiency. For sequencing library preparation, high-sensitivity ChIP-seq kits take your immunoprecipitated DNA directly to Illumina-ready output, from inputs as low as 1 ng. For CUT&RUN, a compatible library prep kit is available for generating high-quality sequencing libraries from as little as 0.5 ng of purified DNA.
Choosing the right ChIP or CUT&RUN approach
- For an antibody-based chromatin profiling workflow without crosslinking or sonication: use CUT&RUN. This MNase-based, antibody-tethered cleavage method needs no sonicator and works with low cell numbers in a streamlined single-tube format.
- If you want to validate a ChIP antibody before full-scale experiments: a ChIP antibody validation kit gives you a specificity read against native chromatin in under 90 minutes, without running a full immunoprecipitation.
- For high-resolution histone mark mapping with CUT&RUN: Concanavalin A-conjugated paramagnetic beads capture nuclei, and pairing these with recombinant nucleosome spike-in controls gives you quantitative inter-sample normalisation.
- For quantitative normalisation across ChIP samples on methylation marks: a recombinant nucleosome spike-in panel gives you defined mono-, di-, and tri-methylation states on key H3 residues, for normalisation of your pulldown efficiency.
- For ChIP-seq Illumina library prep from low-input pulldown DNA: a high-sensitivity ChIP-seq library construction kit handles 1 to 10 ng of your input and gives you Illumina-compatible output.
Parent category: epigenetics research kits
Applications
Histone mark mapping
Genome-wide profiling of H3K4me3, H3K27ac, H3K27me3, and H3K9me3 maps active, repressed, and heterochromatic states, complemented by histone modification assays.
Transcription factor occupancy
Mapping genomic binding sites of factors such as p53, CTCF, or NF-kB in response to stress or differentiation cues, alongside transcription factor assays.
Chromatin state transitions in cancer
Comparing active and repressive marks between tumour and normal cells finds elements linked to oncogene activation or suppressor silencing.
Drug mechanism studies
Profiling histone acetylation changes after HDAC inhibitor treatment, to map the genomic loci where drug activity is concentrated.
Low-input CUT&RUN and CUT&Tag profiling
Antibody-tethered nuclease methods work from 1,000 to 100,000 cells and finish in a single day, suited to your rare samples.
Quantitative ChIP-seq normalisation
Spike-in panels of recombinant nucleosomes with defined modification states normalise pulldown efficiency across your samples and timepoints.
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Chromatin Preparation & Analysis
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General ChIP Kits
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SNAP-ChIP Spike-in Panels & Validated Antibodies
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Frequently asked questions
Two common strategies are used. The first adds a fixed amount of chromatin from a second species before immunoprecipitation. Species-specific reads then act as an internal scaling factor. The second spikes in recombinant nucleosomes carrying defined modification states at known amounts before pulldown. Both approaches correct for variation between samples in immunoprecipitation efficiency. Both allow quantitative comparison of mark levels across conditions.
Standard ChIP-seq protocols typically need 1 to 10 million cells. Low-input ChIP-seq kits with pre-amplification can work from 50,000 to 500,000 cells. CUT&RUN needs as few as 1,000 to 100,000 cells for histone marks. It needs 500,000 or more for lower-abundance transcription factors, depending on antibody affinity.
The antibody is the single most critical variable. An antibody that cross-reacts with neighbouring PTM states or with unmodified histone will produce false enrichment peaks and inflated background. This leads to misleading biological conclusions. The most reliable way to confirm specificity is to test the antibody against modified and unmodified nucleosomes or peptides before use. Also check published validation data in ChIP applications.
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