Anti-Amino-terminal enhancer of split antibody (ab16638)


  • Product name
    Anti-Amino-terminal enhancer of split antibody
    See all Amino-terminal enhancer of split primary antibodies
  • Description
    Rabbit polyclonal to Amino-terminal enhancer of split
  • Host species
  • Tested applications
    Suitable for: IP, WBmore details
  • Species reactivity
    Reacts with: Human
    Predicted to work with: Mouse, Rat
  • Immunogen

    Synthetic peptide conjugated to KLH derived from within residues 150 to the C-terminus of Human GRG (Groucho homologue).

    Read Abcam's proprietary immunogen policy (Peptide available as ab16684.)

  • Positive control
    • This antibody gives a positive signal in WB against Recombinant His-tagged GRG



Our Abpromise guarantee covers the use of ab16638 in the following tested applications.

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

Application Abreviews Notes
IP Use at an assay dependent concentration.
WB Use a concentration of 1 µg/ml. Detects a band of approximately 32 kDa (predicted molecular weight: 22 kDa).


  • Function
    Transcriptional corepressor. Acts as dominant repressor towards other family members. Inhibits NF-kappa-B-regulated gene expression. May be required for the initiation and maintenance of the differentiated state. Essential for the transcriptional repressor activity of SIX3 during retina and lens development.
  • Tissue specificity
    Found predominantly in muscle, heart and Placenta. In fetal tissues, abundantly expressed in the heart, lung, kidney, brain and liver.
  • Sequence similarities
    Belongs to the WD repeat Groucho/TLE family.
  • Domain
    Lacks the C-terminal WD repeats.
  • Post-translational
    Ubiquitinated by XIAP/BIRC4.
  • Cellular localization
  • Information by UniProt
  • Database links
  • Alternative names
    • Aes 1 antibody
    • Aes 2 antibody
    • aes antibody
    • AES_HUMAN antibody
    • Aes1 antibody
    • Aes2 antibody
    • Amino enhancer of split antibody
    • Amino terminal enhancer of split antibody
    • Amino-terminal enhancer of split antibody
    • Esp 1 antibody
    • Esp1 antibody
    • Gp130 associated protein GAM antibody
    • Gp130-associated protein GAM antibody
    • GRG 5 antibody
    • GRG antibody
    • GRG protein antibody
    • Grg-5 antibody
    • GRG5 antibody
    • Groucho-related protein 5 antibody
    • Protein ESP 1 antibody
    • Protein ESP1 antibody
    • Protein GRG antibody
    • TLE 5 antibody
    • TLE5 antibody
    see all


  • All lanes : Anti-Amino-terminal enhancer of split antibody (ab16638) at 1 µg/ml

    Lanes 6-10 : Human Amino-terminal enhancer of split peptide (ab16684) at 1 µg/ml

    Performed under reducing conditions.

    Predicted band size: 22 kDa
    Observed band size: 21 kDa
    why is the actual band size different from the predicted?
    Additional bands at: 26 kDa (possible cross reactivity), 28 kDa (possible cross reactivity), 33 kDa (possible cross reactivity), 40 kDa (possible cross reactivity), 53 kDa (possible cross reactivity), 75 kDa (possible cross reactivity), 80 kDa (possible cross reactivity)

    1 - 10 : GRG (Groucho homologue) antibody (ab16638) at 1 ug/ml
    6 - 10 : GRG (Groucho homologue) peptide (ab16684) at 1 ug/ml
    1, 6: Recombinant His-tagged GRG (28ug)
    2, 7: Human muscle (20ug)
    3, 8: Human heart (20ug)
    4, 9: Human embryonic stem cell lysate
    5, 10: Mouse embryonic stem cell lysate

    Observed band size : 32 kDa (arrow)
    Additional bands at : 21 kDa (possible non-specific binding, possible endogenous GRG), 28 kDa (possible non-specific binding, possible endogenous GRG), 35 kDa (possible non-specific binding), 40 kDa (possible non-specific binding), 53 kDa (possible non-specific binding), 75 kDa (possible non-specific binding), 80 kDa (possible non-specific binding).

    A major band coresponding to GRG was observed in HEK293 lysates in which His-tagged GR had been overexpressed. Many


ab16638 has not yet been referenced specifically in any publications.

Customer reviews and Q&As

1-5 of 5 Abreviews or Q&A

Abcam has not validated the combination of species/application used in this Abreview.
Immunocytochemistry/ Immunofluorescence
Mouse Cell (ES cells)
ES cells
Yes - PBS/Triton
Blocking step
Serum as blocking agent for 1 hour(s) and 0 minute(s) · Concentration: 5% · Temperature: RT°C

Abcam user community

Verified customer

Submitted Jan 27 2012


Thank you very much for your interest in ab86016, ab16638 and ab62555. To our knowledge, these antibodies have not been tested in with IF. ab16638, although predicted to react with mouse GRG, this has also not been tested as yet. Therefore, I can offer a discount off a future purchase if you buy ab86016, ab16638 and ab62555 now, test it in with IF with mouse samples and submit feedback to us in the form of an Abreview. It doesn’t matter whether the Abreview is positive or negative, we would just really like to receive your feedback. The discount would be to the value of 1 free primary antibody of your choice. If you are interested in this offer, please follow these steps: 1. Reply to this e-mail to let me know that you would like to proceed and test ab86016, ab16638 and ab62555 in IF. I will then send a discount code. This code must be issued before purchasing the antibodies so please wait for my reply before ordering. 2. Purchase ab86016, ab16638 and ab62555 either by phone, fax, or online ( 3. Test it in IF. 4. Let us know the results, positive or negative, using our Abreview system (this will take about 10 minutes and images are great if you have them!). To find out how to submit an Abreview, please visit: 5. After the review is submitted to us, the discount code becomes active. Simply place your new order by phone, fax, or on the web and mention the discount code. The discount can be redeemed for any primary antibody ordered and the discount code is valid for 4 months after issue. We are always pleased to obtain feedback about our products and any information is greatly appreciated! Even if ab86016, ab16638 or ab62555 turns out to be unsuitable for IF, you will still receive the discount on your next purchase after your Abreview has been submitted. Please let me know if you have any questions about this offer and I would be happy to help you further. The Terms and Conditions of this offer can be found at:

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Abcam guarantees this product to work in the species/application used in this Abreview.
Human Cell lysate - nuclear (HeLa)
Total protein in input
3e+007 cells
Immuno-precipitation step
Protein A

Abcam user community

Verified customer

Submitted Apr 20 2010

Abcam guarantees this product to work in the species/application used in this Abreview.
Western blot
Human Cell lysate - nuclear (HeLa, HepG2, K562, GM12878, Jurkat)
Loading amount
10 µg
HeLa, HepG2, K562, GM12878, Jurkat
Gel Running Conditions
Reduced Denaturing (10-14% Tris-HCl)
Blocking step
Milk as blocking agent for 2 hour(s) and 0 minute(s) · Concentration: 5% · Temperature: 25°C

Abcam user community

Verified customer

Submitted Apr 14 2010


Thank you for your patience. I have received confirmation that the sequence from this antibody cross reacts with Q08117 (197AA long) and Q14CJ1 (264AA long). There is no indication of this cross reacting with any other forms though on looking at Q08117 there is no indication that there are 6 isoforms as well. I hope this information will be useful to you. Should you require any further information, please do not hesitate to contact me.

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