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Pack Size:100μg/vial
Validated Species:Human, Mouse, Rat
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Product Name Anti-UBE2I/UBC9 Antibody
SKU/Catalog Number PA2258
Description Rabbit IgG polyclonal antibody for SUMO-conjugating enzyme UBC9(UBE2I) detection. Tested with WB in Human;Mouse;Rat.
Cite This Product Anti-UBE2I/UBC9 Antibody (Boster Biological Technology, Pleasanton CA, USA, Catalog # PA2258)
Replacement Item This antibody may replace the following items: sc-10759|sc-130281|sc-136245|sc-271057|sc-5231 from Santa Cruz Biotechnology.
Host Rabbit
Isotype N/A
Validated Species Human, Mouse, Rat
Predicted Species Chicken

*This antibody is predicted to react with the above species based on antigen sequence similarities. Our Boster Guarantee covers the use of this product with the above species.

Application WB

*Our Boster Guarantee covers the use of this product in the above tested applications.

**For positive and negative control design, consult "Tissue specificity" under Protein Target Info.

Recommended Detection Systems Boster recommends Enhanced Chemiluminescent Kit with anti-Rabbit IgG (EK1002) for Western blot.
*Blocking peptide can be purchased at $50. Contact us for more information
**Boster also offers various secondary antibodies for Immunoflourescecne and IHC. Take advantage of the buy 1 primary antibody get 1 secondary antibody for free promotion for the entire year 2017!
Immunogen A synthetic peptide corresponding to a sequence at the C-terminus of human UBE2I(108-122aa IKQILLGIQELLNE), identical to the related mouse and rat sequences.
Cross Reactivity No cross reactivity with other proteins
Pack Size 100μg/vial


Clonality Polyclonal
Form Lyophilized
Contents Each vial contains 5mg BSA, 0.9mg NaCl, 0.2mg Na2HPO4, 0.05mg Thimerosal, 0.05mg NaN3.
*carrier free antibody available upon request.
Concentration Add 0.2ml of distilled water will yield a concentration of 500ug/ml.
Storage At -20°C for one year. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for a longer time.Avoid repeated freezing and thawing.
Purification Immunogen affinity purified.
Isotype N/A

Protein Target Info (Source:

You can check the tissue specificity below for information on selecting positive and negative control.

Gene Name UBE2I
Protein Name SUMO-conjugating enzyme UBC9
Molecular Weight 18007 MW
Protein Function Accepts the ubiquitin-like proteins SUMO1, SUMO2, SUMO3 and SUMO4 from the UBLE1A-UBLE1B E1 complex and catalyzes their covalent attachment to other proteins with the help of an E3 ligase such as RANBP2 or CBX4. Can catalyze the formation of poly- SUMO chains. Necessary for sumoylation of FOXL2 and KAT5. Essential for nuclear architecture and chromosome segregation. Sumoylates p53/TP53 at 'Lys-386'. .
Tissue Specificity Expressed in heart, skeletal muscle, pancreas, kidney, liver, lung, placenta and brain. Also expressed in testis and thymus. .
Sequence Similarities Belongs to the ubiquitin-conjugating enzyme family.
Subcellular Localization Nucleus. Cytoplasm. Mainly nuclear. In spermatocytes, localizes in synaptonemal complexes. Recruited by BCL11A into the nuclear body (By similarity). .
Uniprot ID P63279
Alternative Names SUMO-conjugating enzyme UBC9;6.3.2.-;SUMO-protein ligase;Ubiquitin carrier protein 9;Ubiquitin carrier protein I;Ubiquitin-conjugating enzyme E2 I;Ubiquitin-protein ligase I;p18;UBE2I;UBC9, UBCE9;
Research Areas |cell biology|proteolysis / ubiquitin|proteasome / ubiquitin|sumo| epigenetics and nuclear signaling|chip'ing antibodies|ubiquitin & ubiquitin like modifiers| metabolism|types of disease|obesity| cell biology|ubiquitin e2 enzymes|
*if product is indicated to react with multiple species, protein info is based on the human gene.

Background for SUMO-conjugating enzyme UBC9

SUMO-conjugating enzyme UBC9(UBE2I), also called UBC9, is a protein that in humans is encoded by the UBE2I gene. This gene encodes a member of the E2 ubiquitin-conjugating enzyme family. It is mapped to 16p13.3. UBC9 could fully complement the mutant phenotype of a yeast ubc9 mutant strain. This gene may play a similar role via interaction with WT1, which is able to impose a block to cell cycle progression in eukaryotic cells. What's more, it could support the growth of yeast ubc9 temperature-sensitive mutants at nonpermissive temperatures, indicating that the gene is a functional homolog of yeast ubc9. UBC9 is specifically associated with FHIT, such as FHIT may be involved in cell cycle control through its interaction with UBC9.

Anti-UBE2I/UBC9 Antibody Images

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Anti-UBE2I/UBC9 Antibody
Anti-UBE2I/UBC9 antibody, PA2258, All Western blotting
All lanes: Anti-UBE2I(PA2258) at 0.5ug/ml
Lane 1: Rat Cardiac Muscle Tissue Lysate at 40ug
Lane 2: Rat Skeletal Muscle Tissue Lysate at 40ug
Lane 3: Rat Pancreas Tissue Lysate at 40ug
Predicted bind size: 18KD
Observed bind size: 18KD
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Customer Q&As

Q: Do you offer BSA-free antibodies? Keyword: Bovine serum albumin, carrier protein, conjugation
A: Yes, please contact us at for more information about BSA-free antibodies and availability. The new BSA-free formula uses trehalose as a replacement to BSA. We have tested many alternative chemicals and found that trehalose protects the antibodies the best.
Q: Is your western blot protocol provided from the website applicable for all your antibodies? Keyword: applications, WB
A: The protocol is applicable for all our antibodies in WB, the NC Membrane(0.45μm or 0.22μm) and transfer time(70 mins or 50 mins) depends on the protein molecular weight, details can be found in included protocol.
Q: Can I conjugate markers to this antibody? Can I link custom conjugates to this antibody? Keyword: conjugation
A: The antibody is stored with BSA and cannot be conjugated with markers. Carrier free antibodies are available upon request. Please contact
Q: What should I use for negative control?
A: Please contact us for negative control suggestions. You can also check expression databases such as genecards, uniprot etc. Due to logistic reasons, we do not sell serum or lysates that we use internally for positive or negative control.
Q: Where can I find troubleshooting information? What should I do if I have unexpected bands, high background, no signal, weak signal
A: You can find Boster's troubleshoot guides under tech support tab. Please contact us for further assistance on troubleshooting your experiment.
Q: What is the immunogen sequence of this antibody? Is this antibody polyclonal or monoclonal?
A: You can find the immunogen sequence under "Immunogen" and clonality in the product name.
Q: What is the expected band size? Why is it different than the observed band size?
A: The expected band size is predicted on the size of the protein. The actual band size may be affected by a few other factors including but not limited to:
1. Post-translational modification:phosphorylation, methylation, glycosylation etc. These modifications prevent SDS molecules from binding to the target protein and thus make the band size appear larger than expected
2. Post-translational cleavage: this can cause smaller bands and or multiple bands

3. Alternative splicing: the same gene can have alternative splicing patterns generating different size proteins, all with reactivities to the antibody.

4. Amino Acid R chain charge: SDS binds to positive charges. The different size and charge of the Amino Acid side chains can affect the amount of SDS binding and thus affect the observed band size.
5. Multimers: Multimers are usually broken up in reducing conditions. However if the interactions between the multimers are strong, the band may appear higher.,
Q: What is the suggested dilution ratio for Western Blot (WB), Immunohistochemistry (IHC) and or ELISA standards? What is the optimal pH for the sample?
A: Check the datasheet for the product for details on dilution ratios for different experiments. You can find the datasheet button on the right side of the product page.
Q: What is the protocol you used for your Western blotting (WB) and Immunohistochemistry (IHC)?
A: Check our protocols under the tech support tab.
Q: What are some alternative names that could be used to describe this product?
A: Some common names include but are not limited to p18 antibody, ubc9 antibody