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C2549-22E Mouse Anti-CD274 (B7-h1 Protein, B7-H1, B7H1, PD-L1, PDCD1L1, PDCD1LG1, PDL1)

Specifications
References
Clone Type
Monoclonal
Host
Mouse
Source
Human
Swiss Prot
Q9NZQ7
Isotype
IgG1
Clone Number
9L814
Grade
Affinity Purified
Applications
E FC IHC
Crossreactivity
Hu
Shipping Temp
Blue Ice
Storage Temp
-20°C

B7-H1, also known as PD-L1 and CD274, is a 50kD type I transmembrane protein in the B7 family. B7-H1 contains one Ig-like C2-type domain and one Ig-like V-type domain. It is constitutively expressed in several tissues and is upregulated on various tumors and activated dendritic cells, macrophages, and B cells. B7-H1 interacts with PD-1 on T cells to limit T cell activation and regulate immune tolerance. Within the extracellular region, mouse and human B7-H1 share 73% aa sequence identity.

Applications
Suitable for use in Direct ELISA, Flow Cytometry and Immunohistochemistry. Other applications not tested.
Recommended Dilutions
Flow Cytometry: 0.25ug/10e6 Jurkat human acute T cell leukemia cell line. Immunohistochemistry: 8-25ug/ml using immersion fixed paraffin-embedded sections of human colon Optimal dilutions to be determined by the researcher.
Storage and Stability
Lyophilized and reconstituted products are stable for 12 months after receipt at -20°C. Reconstitute with sterile PBS. Aliquot to avoid repeated freezing and thawing. Store at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.
Immunogen
Recombinant protein corresponding to Phe19-Thr239 of human CD274 (B7-H4) expressed in NS0 cells.
Form
Supplied as a lyophilized powder from PBS, pH 7.4, 5% trehalose. Reconstitute with 200ul sterile PBS.
Purity
Purified by Protein G affinity chromatography from hybridoma culture supernantant.
Specificity
Recognizes human CD274 (B7-H4). Does not crossreact with recombinant human B7-1, -2, -H2, -H3, -H3b, -H4, recombinant human PD-L2, recombinant mouse B7-H1, recombinant rat B7-1 or B7-2.
References
1. Nishimura, H. and T. Honjo (2001) Trends Immunol. 22:265. 2. Freeman, G.J. et al. (2000) J. Exp. Med. 192:1027. 3. Latchman, Y. et al. (2001) Nat. Immunol. 2:261.
USBio References
No references available
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