SKU: 66846540935

CBLB/RNF56(36-426) Protein, Human

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Description

CBLB/RNF56(36-426) Protein, HumanProduct Specification Species Human Synonyms CBL B, CBLB, RNF56, Casitas B lineage lymphoma proto oncogene b, RING finger protein 56 Accession Q13191 Amino Acid Sequence Pro36 Phe426 Expression System E. coli Molecular Weight 40 55kDa (Reducing) Purity 95% by SDS PAGE & HPLC Conjugation Unconjugated Tag No Tag Physical Appearance Liquid Storage Buffer 50mM Tris, 200mM NaCl, 1mM DTT, pH7. 5, 10%Glycerol Stability & Storage Stable for 12 months upon

Product Specification


Species Human
Synonyms CBL-B, CBLB, RNF56, Casitas B-lineage lymphoma proto-oncogene b, RING finger protein 56
Accession Q13191
Amino Acid Sequence

Pro36-Phe426

Expression System E.coli
Molecular Weight 40-55kDa (Reducing)
Purity >95% by SDS-PAGE & HPLC
Conjugation Unconjugated
Tag No Tag
Physical Appearance Liquid
Storage Buffer

50mM Tris, 200mM NaCl, 1mM DTT, pH7.5, 10%Glycerol

Stability & Storage

Stable for 12 months upon stored at -80℃ from the date of receipt. And avoid repeated freeze-thaws cycles.

Reference

1. PKC-theta modulates the strength of T cell responses by targeting Cbl-b for ubiquitination and degradation. Science Signaling, 2(76), ra30.
2. Negative regulation of lymphocyte activation and autoimmunity by the molecular adaptor Cbl-b. Nature, 403(6766), 211-216.
3. Cbl-b regulates the CD28 dependence of T-cell activation. Nature, 403(6766), 216-220.

Background

CBLB (Casitas B-lineage Lymphoma Proto-Oncogene B), also known as RNF56 (RING Finger Protein 56), is an E3 ubiquitin-protein ligase that plays a critical role as a negative regulator of immune receptor signaling. It belongs to the CBL family of RING finger E3 ubiquitin ligases and is encoded by the gene located on chromosome 3q13.11.

Mechanism of Action: CBLB promotes proteasome-mediated protein degradation by transferring ubiquitin from specific E2 ubiquitin-conjugating enzymes to substrate proteins. Structurally, it contains several functional domains: an N-terminal tyrosine kinase-binding (TKB) domain (composed of a four-helix bundle, a Ca²⁺-binding EF-hand, and a variant SH2 domain), a proline-rich domain, a nuclear localization signal, a C3HC4-type RING-HC finger, and a ubiquitin-associated (UBA) domain. The RING finger domain confers the E3 ligase activity essential for ubiquitination.

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SKU: 66846540935

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Christy Almquist
West Palm Beach, US
★★★★★ 5
Good if they fit
Special Size: Midweight, Size: 30W x 30L, Color: Dark Midnight Wash
The jeans are great, once I got the right size, but these I brought back to Whole Foods and got charged anyway because Amazon never got them back!! But cheaper than Levi’s
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Reviewed in the United States on May 22, 2026
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Emmamom
Belleville, US
★★★★★ 4
Important fit information
Special Size: Midweight, Size: 34W x 30L, Color: Tinted Medium Blue
Be aware that these jeans are loose fit, not fitted through hips and thighs. Excellent quality, well made, great value. But if you are not overweight, if you have a trim build you will NOT like these. They were very baggy and loose around my husband's butt and thighs, so we had to return them. However, if you have a more generous build under your size 34 waist you WILL like these, and the waist has some stretch. I removed one star for calling these fitted through hips and thighs. They're not.
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Reviewed in the United States on April 8, 2026
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G.P. CEPENAS
Alexandria, US
★★★★★ 5
Great fit and value for quality jeans
Special Size: Midweight, Size: 42W x 30L, Color: Tinted Medium Blue
For once I bought a pair of jeans that are super comfortable and feel like I’ve had them for years I had to return for a shorter size which was no problem and they now fit perfect Very good quality material like Levi’s or Wranglers not like inferior substitutes Great value for a quality product
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Reviewed in the United States on March 8, 2026
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David Hamlin
Belleville, US
★★★★★ 5
Good
Special Size: Midweight, Size: 40W x 30L, Color: Tinted Medium Blue
The length runs long. The waist fits good
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Reviewed in the United States on May 2, 2026
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Steve
Lexington, US
★★★★★ 3
Couldn't get the zipper button open!
Special Size: Midweight, Size: 38W x 30L, Color: Dark Midnight Wash
Returned. They are probably a good product but I have arthritis in my thumbs and it was excruciating to try to undo the button above the fly. I seemed like like the button hole was too small. Maybe a gorilla finished final assembly?
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Reviewed in the United States on May 5, 2026

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