Product Specifications for Recombinant Human MICB His-tag Protein, CF
Chinese Hamster Ovary cell line, CHO-derived human MICB protein Ala23-Thr308, with a C-terminal 6-His tag
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
<0.10 EU per 1 μg of the protein by the LAL method.
N-terminal sequence Analysis
Ala23 & Glu24
Predicted Molecular Mass
35-55 kDa, under reducing conditions
Measured by its binding ability in a functional ELISA. When Recombinant Human NKG2D/CD314 Fc Chimera (Catalog # 1299-NK) is immobilized at 0.125 μg/mL, 100 μL/well, the concentration of Recombinant Human MICB His-tag (Catalog # 10431-MB) that produces 50% of the optimal binding response is approximately 80-400 ng/mL.
Scientific Data Examples for Recombinant Human MICB His-tag Protein, CF
Recombinant Human MICB His-tag Protein Binding Activity
When Recombinant Human NKG2D/CD314 Fc Chimera (Catalog # 1299-NK) is immobilized at 0.125 µg/mL, 100 µL/mL, the concentration of Recombinant Human MICB His-tag (Catalog # 10431-MB) produces 50% of the optimal binding response is approximately 80-400 ng/mL.
Recombinant Human MICB His-tag Protein SDS-PAGE
2 μg/lane of Recombinant Human MICB His-tag Protein (Catalog # 10431-MB) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands 35-55 kDa.
Formulation, Preparation and Storage
What does CF mean?
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our
Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant
protein to be stored at a more dilute concentration.
The carrier free version does not contain BSA.
What formulation is right for me?
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or
as an ELISA standard.
In contrast, the carrier free protein is recommended for applications, in which the presence of BSA
Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitute at 500 μg/mL in PBS.
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage:
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
3 months, -20 to -70 °C under sterile conditions after reconstitution.
Major Histocompatibility Complex Class I Chain-related Gene B (MICB) is a transmembrane glycoprotein that functions as a ligand for human Natural-Killer Group 2 Member D (NKG2D) (1). MICB, along with the highly related MICA, are members of the non-classical MHC class I family. Similar to classical MHC class I proteins, MICB contains three Ig-like domains ( alpha 1, alpha 2, and alpha 3) in the extracellular domain (ECD), a transmembrane segment, and a carboxy-terminal cytoplasmic tail (2). The genes encoding MICA and MICB are found within the MHC on the short arm of human chromosome 6 and occur in most mammalian species but are absent from mouse and rat (2-4). Despite structural similarities, MICA/B only share ~27% amino acid (aa) identity with human MHC class I proteins (3). Both MICA and MICB display a significant degree of polymorphism within the ECD and this enables them to be reconfigured and bind with NKG2D rather than binding with beta 2-microglobulin (4, 5). Recognition of MICA/B by NKG2D results in the activation of cytolytic activity and/or cytokine production on NK cells, NKT cells, gamma δ T cells, and CD8+ alpha beta T cells (6, 7). MICA/B recognition is involved in tumor surveillance, viral infections, and autoimmune diseases. The release of soluble forms of MICA/B from tumors down-regulates NKG2D surface expression on effector cells resulting in the impairment of anti-tumor immune response (2, 8-11). Inhibition of MICA/B shedding through targeted antibodies allows anti-tumor immunity to be retained (12).
Huang, C. et al. (2018) Sci. Rep. 8:15821.
Bahram, S. et al. (1994) Proc. Natl. Acad. Sci. USA 91:6259.
Cosman, D. et al. (2001) Immunity 14:123.
Groh, V. et al. (2001) Nature Immunol. 2:255.
Stephens, H. (2001) Trends Immunol. 22:378.
Bauer, S. et al. (1999) Science 285:727.
Kawabata, Y. et al. (2000). Human Immunology. 61:624.
Groh, V. et al. (2002) Nature 419:734.
Steinle, A. et al. (2001) Immunogenetics 53:279.
Pende, D. et al. (2002) Cancer Res. 62:6178.
Salih, H. et al. (2003) Blood 102:1389.
Ferrari de Andrade et al. (2018) Science 359:1537.
MHC Class I-related Protein B
Entrez Gene IDs
MHC class I chain-related protein B, MHC class I mic-B antigen, MHC class I polypeptide-related sequence B, MIC-B, MICB, PERB11.2MHC class I-like molecule PERB11.2-IMX, stress inducible class I homolog
Citations for Recombinant Human MICB His-tag Protein, CF
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Product Documents for Recombinant Human MICB His-tag Protein, CF
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