Boris / CTCFL antibody (pAb)

RRID: AB_2793368
Aliases: CT27, BORIS, CTCF-T, HMGB1L1
Catalog No: 39851 Format: 100 µl $490 Buy
Catalog No: 39852 Format: 10 µl $120 Buy

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Antibody Type:
Affinity Purified
Molecular Weight:
96 kDa


ChIP Validated ChIP-Seq Validated Western Blot Validated

Application Notes

Applications Validated by Active Motif:
ChIP: 5 µl per ChIP
ChIP-Seq: 5 µl each
WB: 1:500 - 1:2,000 dilution

ChIP-Seq validation was performed by Active Motif's Epigenetics Services; the complete data set is available in the UCSC Genome Browser by clicking here.

For CTCF, we also offer AbFlex® CTCF Recombinant Antibody (rAb). For details, see Catalog No. 91285.

Published Applications

The following applications have been published using this antibody. Unless noted above, Active Motif may not have validated the antibody for use in these applications:


View publications that use Active Motif products & services here. Enter the product number(s) to see publications & applications that use this antibody.


This antibody was raised against a peptide within the N-terminal region of human BORIS.


Purified IgG in 70 mM Tris (pH 8), 105 mM NaCl, 31 mM glycine, 0.07 mM EDTA, 30% glycerol and 0.035% sodium azide. Sodium azide is highly toxic.


Boris / CTCFL antibody (pAb) tested by ChIP-Seq.
ChIP was performed using the ChIP-IT® High Sensitivity Kit (Cat. No. 53040) with 30 ug of chromatin from human testis and 2 µl of antibody. ChIP DNA was sequenced on the Illumina HiSeq and 20 million sequence tags were mapped to identify Boris / CTCFL binding sites. The image shows binding across a region of chromosome 7. You can view the complete data set in the UCSC Genome Browser, starting at this specific location, here.

BORIS / CTCFL antibody (pAb) tested by Western blot.
Whole cell extract (10 μg per lane) from HEK293T cells transfected with either vector alone (lanes 1 and 3), with a FLAG-Tagged human BORIS expression vector (lanes 2 and 4) or mouse testis nuclear extract (30 μg, lane 5) was probed with either BORIS / CTCFL antibody at 1:2,000 (lanes 1 and 2) or 1:500 (lane 5) or anti-FLAG-Tag (lanes 3 and 4).


BORIS (Brother of Regulator of Imprinted Sites) / CTCFL (CTCF-like) is a zinc-finger DNA binding protein that acts as a chromatin insulator and a paralog of the CTCF protein. Normally, BORIS / CTCFL is expressed only in primary spermatocytes and is thought to play a role in resetting DNA methylation marks during the differentiation of male germ cells. BORIS / CTCFL is also expressed in many cancers and may serve a pro-proliferative function.

Chromatin IP Assays

This antibody has been validated for use in ChIP and/or ChIP-Seq, and can be used with Active Motif's ChIP-IT® High Sensitivity Kit or our magnetic bead-based ChIP-IT® Express Kits. For an overview of all of our ChIP products, please visit our Chromatin IP Page to learn about ChIP products designed for use with Boris / CTCFL antibody (pAb).


Some products may be shipped at room temperature. This will not affect their stability or performance. Avoid repeated freeze/thaw cycles by aliquoting items into single-use fractions for storage at -20°C for up to 2 years. Keep all reagents on ice when not in storage.


This product is guaranteed for 12 months from date of receipt.

This product is for research use only and is not for use in diagnostic procedures.

Application Key

  • ChIP = Chromatin Immunoprecipitation;
  • ChIP = ChIP Sequencing;
  • CUT&RUN = Cleavage Under Targets and Release Using Nuclease;
  • CUT&Tag = Cleavage Under Targets and Tagmentation;
  • DB = Dot Blot;
  • ELISA = Enzyme-linked Immunosorbent Assay;
  • EMSA = Electrophoretic Mobility Shift Assay
  • FC = Flow Cytometry;
  • ICC = Immunocytochemistry;
  • IF = Immunofluorescence;
  • IHC = Immunohistochemistry;
  • IP = Immunoprecipitation;
  • MeDIP = Methyl-DNA Immunoprecipitation;
  • NEU = Neutralizing;
  • WB = Western Blotting