• Nature
  • Amino Acid Sequence
    • Species
    • Modifications
      mono methyl K4


Our Abpromise guarantee covers the use of ab1340 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

  • Applications

    Blocking - Blocking peptide for Anti-Histone H3 (mono methyl K4) antibody - ChIP Grade (ab8895)

    Dot blot

  • Form
  • Additional notes

    - First try to dissolve a small amount of peptide in either water or buffer. The more charged residues on a peptide, the more soluble it is in aqueous solutions.
    - If the peptide doesn’t dissolve try an organic solvent e.g. DMSO, then dilute using water or buffer.
    - Consider that any solvent used must be compatible with your assay. If a peptide does not dissolve and you need to recover it, lyophilise to remove the solvent.
    - Gentle warming and sonication can effectively aid peptide solubilisation. If the solution is cloudy or has gelled the peptide may be in suspension rather than solubilised.
    - Peptides containing cysteine are easily oxidised, so should be prepared in solution just prior to use.

  • Concentration information loading...

Preparation and Storage

  • Stability and Storage

    Store at -80°C.

    Information available upon request.

General Info

  • Alternative names
    • H3 histone family member E pseudogene
    • H3 histone family, member A
    • H3/A
    • H31_HUMAN
    • H3F3
    • H3FA
    • Hist1h3a
    • HIST1H3B
    • HIST1H3C
    • HIST1H3D
    • HIST1H3E
    • HIST1H3F
    • HIST1H3G
    • HIST1H3H
    • HIST1H3I
    • HIST1H3J
    • HIST3H3
    • histone 1, H3a
    • Histone cluster 1, H3a
    • Histone H3 3 pseudogene
    • Histone H3.1
    • Histone H3/a
    • Histone H3/b
    • Histone H3/c
    • Histone H3/d
    • Histone H3/f
    • Histone H3/h
    • Histone H3/i
    • Histone H3/j
    • Histone H3/k
    • Histone H3/l
    see all
  • Function
    Core component of nucleosome. Nucleosomes wrap and compact DNA into chromatin, limiting DNA accessibility to the cellular machineries which require DNA as a template. Histones thereby play a central role in transcription regulation, DNA repair, DNA replication and chromosomal stability. DNA accessibility is regulated via a complex set of post-translational modifications of histones, also called histone code, and nucleosome remodeling.
  • Sequence similarities
    Belongs to the histone H3 family.
  • Developmental stage
    Expressed during S phase, then expression strongly decreases as cell division slows down during the process of differentiation.
  • Post-translational
    Acetylation is generally linked to gene activation. Acetylation on Lys-10 (H3K9ac) impairs methylation at Arg-9 (H3R8me2s). Acetylation on Lys-19 (H3K18ac) and Lys-24 (H3K24ac) favors methylation at Arg-18 (H3R17me).
    Citrullination at Arg-9 (H3R8ci) and/or Arg-18 (H3R17ci) by PADI4 impairs methylation and represses transcription.
    Asymmetric dimethylation at Arg-18 (H3R17me2a) by CARM1 is linked to gene activation. Symmetric dimethylation at Arg-9 (H3R8me2s) by PRMT5 is linked to gene repression. Asymmetric dimethylation at Arg-3 (H3R2me2a) by PRMT6 is linked to gene repression and is mutually exclusive with H3 Lys-5 methylation (H3K4me2 and H3K4me3). H3R2me2a is present at the 3' of genes regardless of their transcription state and is enriched on inactive promoters, while it is absent on active promoters.
    Methylation at Lys-5 (H3K4me), Lys-37 (H3K36me) and Lys-80 (H3K79me) are linked to gene activation. Methylation at Lys-5 (H3K4me) facilitates subsequent acetylation of H3 and H4. Methylation at Lys-80 (H3K79me) is associated with DNA double-strand break (DSB) responses and is a specific target for TP53BP1. Methylation at Lys-10 (H3K9me) and Lys-28 (H3K27me) are linked to gene repression. Methylation at Lys-10 (H3K9me) is a specific target for HP1 proteins (CBX1, CBX3 and CBX5) and prevents subsequent phosphorylation at Ser-11 (H3S10ph) and acetylation of H3 and H4. Methylation at Lys-5 (H3K4me) and Lys-80 (H3K79me) require preliminary monoubiquitination of H2B at 'Lys-120'. Methylation at Lys-10 (H3K9me) and Lys-28 (H3K27me) are enriched in inactive X chromosome chromatin.
    Phosphorylated at Thr-4 (H3T3ph) by GSG2/haspin during prophase and dephosphorylated during anaphase. Phosphorylation at Ser-11 (H3S10ph) by AURKB is crucial for chromosome condensation and cell-cycle progression during mitosis and meiosis. In addition phosphorylation at Ser-11 (H3S10ph) by RPS6KA4 and RPS6KA5 is important during interphase because it enables the transcription of genes following external stimulation, like mitogens, stress, growth factors or UV irradiation and result in the activation of genes, such as c-fos and c-jun. Phosphorylation at Ser-11 (H3S10ph), which is linked to gene activation, prevents methylation at Lys-10 (H3K9me) but facilitates acetylation of H3 and H4. Phosphorylation at Ser-11 (H3S10ph) by AURKB mediates the dissociation of HP1 proteins (CBX1, CBX3 and CBX5) from heterochromatin. Phosphorylation at Ser-11 (H3S10ph) is also an essential regulatory mechanism for neoplastic cell transformation. Phosphorylated at Ser-29 (H3S28ph) by MLTK isoform 1, RPS6KA5 or AURKB during mitosis or upon ultraviolet B irradiation. Phosphorylation at Thr-7 (H3T6ph) by PRKCBB is a specific tag for epigenetic transcriptional activation that prevents demethylation of Lys-5 (H3K4me) by LSD1/KDM1A. At centromeres, specifically phosphorylated at Thr-12 (H3T11ph) from prophase to early anaphase, by DAPK3 and PKN1. Phosphorylation at Thr-12 (H3T11ph) by PKN1 is a specific tag for epigenetic transcriptional activation that promotes demethylation of Lys-10 (H3K9me) by KDM4C/JMJD2C. Phosphorylation at Tyr-42 (H3Y41ph) by JAK2 promotes exclusion of CBX5 (HP1 alpha) from chromatin.
    Monoubiquitinated by RAG1 in lymphoid cells, monoubiquitination is required for V(D)J recombination (By similarity). Ubiquitinated by the CUL4-DDB-RBX1 complex in response to ultraviolet irradiation. This may weaken the interaction between histones and DNA and facilitate DNA accessibility to repair proteins.
  • Cellular localization
    Nucleus. Chromosome.
  • Information by UniProt


  • All lanes : Anti-Histone H3 (mono methyl K4) antibody - ChIP Grade (ab8895) at 1/500 dilution

    Lane 1 : Calf thymus histone lysate
    Lane 2 : Calf thymus histone lysate with Human Histone H3 (mono methyl K4) peptide (ab1340) at 1 µg/ml
    Lane 3 : Calf thymus histone lysate with Human Histone H3 (di methyl K4) peptide (ab7768) at 1 µg/ml
    Lane 4 : Calf thymus histone lysate with Human Histone H3 (tri methyl K4) peptide (ab1342) at 1 µg/ml
    Lane 5 : Calf thymus histone lysate with Human Histone H3 (mono methyl K9) peptide (ab1771) at 1 µg/ml
    Lane 6 : Calf thymus histone lysate with Human Histone H3 (mono methyl K27) peptide (ab1780) at 1 µg/ml
    Lane 7 : Calf thymus histone lysate with Human Histone H3 (unmodified ) peptide (ab2903) at 1 µg/ml

    All lanes : Goat Anti-Rabbit IgG H&L (HRP) (ab6721) at 1/5000 dilution

    Performed under reducing conditions.

    Observed band size: 18 kDa
    why is the actual band size different from the predicted?

    Exposure time: 2 minutes

    ab8895 is specific for mono-methylated Lysine 4 of histone H3 and does not recognize di- or tri-methyl Lysine 4 nor methylation at Lysine 9. This is shown in lane 2 where the activity of the antibody is specifically blocked by the addition of the immunizing peptide (ab1340).

  • ab1340 (at 0.01 and 0.1 μg) used in Dot Blot to test for cross-reactivity of ab8895 (1/2500). An HRP-conjugated Mouse anti-rabbit IgG polyclonal (1/10000) was used as the secondary antibody.

    See Abreview


This product has been referenced in:
See all 3 Publications for this product

Customer reviews and Q&As

1-6 of 6 Abreviews or Q&A


The sequence and purification method is propriety, but if you let me know what is important for you I can check if one of our product fits.

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The molecular weights of the different methylation states be extrememly difficult to distinguish as that type of modification creates a 14Dalton mass change.Currently, we do not offer full length methylated H3K4 proteins. We do have anEpiSeeker Histone Extraction Kit (ab113476) whichprovides a simple and selective method for extracting histone proteins in just 1 hour. When used in conjunction with our peptides you can be confident that the band you are seeing is indeed specific to the mono- di- or tri- methylayed H3K4 protein.

More information about ourEpiSeeker Histone Extraction Kit (ab113476) is available here:


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Peptides are available for both of these products. The peptide for ab8895,Anti-Histone H3 (mono methyl K4) antibody - ChIP Grade, is product number ab1340 (https://www.abcam.com/histone-h3-peptide-mono-methyl-k4-ab1340.html).The peptide for ab8580,Anti-Histone H3 (tri methyl K4) antibody - ChIP Grade, is ab1342 (https://www.abcam.com/histone-h3-peptide-tri-methyl-k4-ab1342.html). These are the exact peptides used to create the antibodies. Each peptide used in the testing assay is available as well. (https://www.abcam.com/index.html?datasheet=1340,https://www.abcam.com/index.html?datasheet=7768),https://www.abcam.com/index.html?datasheet=1342,https://www.abcam.com/index.html?datasheet=1771,https://www.abcam.com/index.html?datasheet=1780,https://www.abcam.com/index.html?datasheet=2903.

These products are tested by peptide assay. Our data on western blot is displayed on the datasheet for each product. For ab8895 our test show itspecific for mono-methylated Lysine 4 of histone H3 and does not recognize di- or tri-methyl Lysine 4 nor methylation at Lysine 9. In the image on the datasheet, this is shown in lane 2where the activity of the antibody is specifically blocked by the addition of the immunizing peptide (ab1340) [https://www.abcam.com/Histone-H3-mono-methyl-K4-antibody-ChIP-Grade-ab8895.html#ab8895_6.gif].

Further,ab8580 are tested in Peptide Array against peptides to different Histone H3 modifications. Six dilutions of each peptide are printed on to the Peptide Array in triplicate and results are averaged before being plotted on to a graph. Results show strong binding to Histone H3 - tri methyl K4 peptide (ab1342), indicating that this antibody specifically recognises the Histone H3 - tri methyl K4 modification [https://www.abcam.com/Histone-H3-tri-methyl-K4-antibody-ChIP-Grade-ab8580.html#Histone-H3-Primary-antibodies-ab8580-153.jpg.]

Each of these products are thoroughly characterized and published. There are links to specific publications and th Abreviews from our customers on each datasheet.

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Review text: I used this product to do a dot blot specificity test for modified histone antibodies and everything worked great. I made two dilutions of the peptide and spotted it on a nitrocellulose membrane using a Bio-Dot apparatus. Once the peptides were bound to the membrane I incubated with the appropriate primary and secondary antibodies at an assay dependent concentration and developed using ECL.
Sample: Human Purified protein

Primary antibody (in addition to 'Histone H3 peptide - mono methyl K4')
Primary antibody: Abcam primary antibody: Anti-Histone H3 (methylated) antibody (ab8895)
Dilution: 1/2500

Secondary antibody
Name: Non-Abcam antibody was used: anti-rabbit
Host species: Rabbit
Clonality: Polyclonal
Conjugation: Horse Radish Peroxidase
Dilution: 1/10000

Abcam user community

Verified customer

Submitted Nov 01 2010


The concentration of lot number: 17195 is 5mg/ml. All subsequence batches of this product are 1mg/ml.

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Thank you for your enquiry. This product has been tested and characterised for blocking studies, immunofluorescence, peptide competition assay. We regret to inform you that we have not tested it for mass spectrometry so we do not have any information about this type of assay.

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