CHI2 Antibody

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Description

Antibody Nomenclature and Possible Interpretations

Antibodies are typically named based on their target antigen, type (e.g., monoclonal, polyclonal), or clinical application. For example:

  • Anti-CHIKV-E2 mAbs: Target the E2 envelope protein of Chikungunya virus (e.g., antibody 19-1) .

  • Meplazumab: A monoclonal antibody targeting CD147 for COVID-19 treatment .

  • Rituximab: Targets CD20 on B-cells for lymphoma treatment .

The term "CHI2" might:

  • Refer to a statistical term: The χ² (chi-square) test is used to analyze contingency tables in antibody-related studies (e.g., testing antibody specificity) .

  • Be a misrepresentation: For example, "CHIKV" (Chikungunya virus) antibodies are well-documented , while "CHI2" is not.

Therapeutic Antibodies

AntibodyTarget/ApplicationKey FindingsSource
MeplazumabCD147 (COVID-19)Reduced viral load and improved clinical outcomes in hospitalized patients .
19-1 (anti-CHIKV-E2)Chikungunya virus E2 proteinHigh specificity, no cross-reactivity with other viruses (e.g., ZIKV, DENV) .
RituximabCD20 (B-cell malignancies)Induces B-cell depletion; used in lymphoma and autoimmune diseases .

Diagnostic Antibodies

ApplicationMethodologyExampleSource
Chikungunya DiagnosisELISA/IFA with anti-E2 mAbsAntibody 19-1 detects CHIKV in serum with high sensitivity .
Autoantibody DetectionATR-FTIR spectroscopy + PCACorrelated anti-Ure antibodies with IR spectral bands in rheumatoid arthritis .

Validation and Quality Control

A large-scale study tested 614 commercial antibodies across 65 proteins, revealing:

  • Performance: ~50% failed in ≥1 application (WB, IP, IF); recombinant antibodies outperformed polyclonal ones .

  • Coverage: ~50–75% of proteins had high-performing antibodies, depending on application .

Statistical Analysis

TestPurposeExampleSource
Chi-Square TestAssess independence in contingency tablesTested West Nile virus distribution across states (χ² = 71.20, p < 0.001) .
McNemar’s TestCompare paired proportionsUsed to analyze antibody performance correlation between applications .

Challenges and Future Directions

  • Cross-Reactivity: Commercial antibodies often bind non-target antigens, necessitating rigorous validation .

  • Therapeutic Limitations: Mouse-derived antibodies trigger immune responses; humanized versions address this .

  • Diagnostic Innovations: ATR-FTIR spectroscopy and machine learning models improve autoantibody detection .

Product Specs

Buffer
Preservative: 0.03% ProClin 300; Constituents: 50% Glycerol, 0.01M PBS, pH 7.4
Form
Liquid
Lead Time
14-16 week lead time (made-to-order)
Synonyms
CHI2 antibody; At5g66220 antibody; K2A18.30Chalcone--flavonone isomerase 2 antibody; Chalcone isomerase 2 antibody; EC 5.5.1.6 antibody
Target Names
CHI2
Uniprot No.

Target Background

Function
This antibody targets an enzyme that catalyzes the intramolecular cyclization of bicyclic chalcones to form tricyclic (S)-flavanones. Specifically, it is responsible for the isomerization of 4,2',4',6'-tetrahydroxychalcone (also known as chalcone) to naringenin.
Database Links

KEGG: ath:AT5G66220

STRING: 3702.AT5G66230.2

UniGene: At.28877

Protein Families
Chalcone isomerase family

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