Recombinant Anti-PD-L1 antibody [28-8]

Recombinant full length protein corresponding to Human PD-L1 (extracellular). The immunogen contains the specific extracellular domain of huPD-L1 (Phe19-Thr239). See reference for more info – www.ncbi.nlm.nih.gov/pmc/articles/PMC4561627/
Database link: Q9NZQ7

• Tissue: Human tonsil, head and neck squamous cell carcinoma and placenta tissues; L2987 cell line. Cell Lines: Positives: B-CPAP (high), ES-2 (medium), HCC70 (low), CHO-PDL1, U-87 MG For additional information – please refer to this publication: Programmed death-ligand 1 (PD-L1) expression in various tumor types – http://www.immunotherapyofcancer.org/content/1/S1/P53 IHC-Fr: Frozen human tonsil tissue sections

FURTHER INFORMATION ON POSITIVE CONTROLS (Chinese version)

Tissue:
– Tonsil – with hyperreactive changes. Screening of hyper-reactive tonsils is recommended to find tonsil with the highest expression of PD-L1 in crypt epithelium, macrophages homing the germinal centers and interfollicular mononuclear leukocytes.
– Tumor tissues – prescreened for positive tumor and inflammatory infiltrates. PD-L1 expression varies by tumor type so screening is recommended to find positive and negative tumor controls.
– The following publication is useful for finding suitable tumor types for PD-L1 expression: 
http://www.immunotherapyofcancer.org/content/1/S1/P53
– Note: Look for specimens with high numbers of inflammatory macrophages and mononuclear leukocytes.

Cell Lines:
– Positive controls: B-CPAP (high), ES-2 (medium), HCC70 (low).

Primary antibody negative control: Recombinant Rabbit IgG isotype control antibody, ab172730.

Recombinant protein positive control: Recombinant human PD-L1 protein, ab167713.

Immunohistochemistry usage:
For IHC usage on FFPE tissues, we recommend using PD-L1 IHC panel ab236676, which contains PD-L1 antibody clone 28-8 (ab205921), HIER antigen retrieval reagent (ab208572) and IHC detection kit HRP/DAB (ab209101).

Western blot usage:
For clone 28-8, it is recommended to use Odyssey system. This system has the advantages of a wider dynamic range and less background than chemiluminescence.

This PD-L1 antibody [28-8] has been used as detector antibody in Human PD-L1 SimpleStep ELISA^® kit: ab214565 and ab277712.

This product is a recombinant monoclonal antibody, which offers several advantages including:

• – High batch-to-batch consistency and reproducibility
• – Improved sensitivity and specificity
• – Long-term security of supply
• – Animal-free production

Our RabMAb^® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMAb^® patents.