Biotinylated Human cytomegalovirus (strain AD169) (HHV-5) & Human UL18 & B2M Heterodimer Protein, His,Avitag™&Tag Free (MALS verified)

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Cat. No. / Size
Price
Qty
ULM-V82W3-25ug
$380.00
ULM-V82W3-200ug
$1570.00
ETA of in-stock products:2 business days

Product Details

  • Synonyms

    UL18 & B2M

  • Source

    Biotinylated HHV-5 & Human UL18 & B2M Heterodimer Protein, His,Avitag&Tag Free (ULM-V82W3) is expressed from human 293 cells (HEK293). It contains AA Gly 19 - Pro 303 (UL18) & Ile 21 - Met 119 (B2M) (Accession # P08560 (UL18) & P61769 (B2M)).

    Predicted N-terminus: Gly 19 (UL18) & Ile 21 (B2M)

    Request for sequence
  • Molecular Characterization

    UL18 & B2M Structure

    Other Tags and Version Biotin & Other Labeled Version

    Biotinylated HHV-5 & Human UL18 & B2M Heterodimer Protein, His,Avitag&Tag Free, produced by co-expression of UL18 and B2M, has a calculated MW of 36.0 kDa (UL18) & 11.7 kDa (B2M). Subunit UL18 carries a polyhistidine tag at the C-terminus, followed by an Avi tag (Avitag™) and subunit B2M contains no tag. The protein migrates as 55-95 kda (UL18) and 10 kDa (B2M) when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE) due to glycosylation.

    The protein is designed as a heterodimer.

  • Labeling

    Biotinylation of this product is performed using Avitag™ technology. Briefly, the single lysine residue in the Avitag is enzymatically labeled with biotin.

  • Protein Ratio

    Passed as determined by the HABA assay / binding ELISA.

  • Purity

    >90% as determined by SDS-PAGE.

    >90% as determined by SEC-MALS.

  • Formulation

    Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 with trehalose as protectant.

    Contact us for customized product form or formulation.

  • Reconstitution

    Please see Certificate of Analysis for specific instructions.

    For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.

  • Storage

    For long term storage, the product should be stored at lyophilized state at -20°C or lower.

    Please avoid repeated freeze-thaw cycles.

    This product is stable after storage at:

    1. -20°C to -70°C for 12 months in lyophilized state;
    2. -70°C for 3 months under sterile conditions after reconstitution.
  • ACRO Quality Management System

    1. QMS(ISO, GMP)
    2. Quality Advantages
    3. Quality Control Process

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Performance Data

  • SDS-PAGE

    UL18 & B2M SDS-PAGE

    Biotinylated HHV-5 & Human UL18 & B2M Heterodimer Protein, His,Avitag&Tag Free on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 90% (With Star Ribbon Pre-stained Protein Marker).

  • SEC-MALS

    UL18 & B2M SEC-MALS

    The purity of Biotinylated HHV-5 & Human UL18 & B2M Heterodimer Protein, His,Avitag&Tag Free (Cat. No. ULM-V82W3) is more than 90% and the molecular weight of this protein is around 50-75 kDa verified by SEC-MALS.

    Report
  • Bioactivity-SPR

     UL18 & B2M SPR

    Human LILRB1, His Tag (Cat. No. CDJ-H52H4) immobilized on CM5 Chip can bind Biotinylated HHV-5 & Human UL18 & B2M Heterodimer Protein, His,Avitag&Tag Free (Cat. No. ULM-V82W3) with an affinity constant of 6.73 nM as determined in a SPR assay (Biacore 8K) (QC tested).

    Protocol

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Background

Human cytomegalovirus (HCMV) encodes UL18, a viral MHC‑I homolog that mimics human HLA class I molecules. UL18 forms a stable heterodimer with human β2‑microglobulin (B2M), enabling proper folding and high‑affinity interaction with the inhibitory receptor LIR‑1/ILT2 on immune cells. This interaction suppresses NK‑cell activation and contributes to HCMV immune evasion. Recombinant UL18–B2M complexes are widely used to study viral immunomodulation and receptor–ligand interactions.

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