The availability of genetically defined reference materials, offers an industry standard for development and quality control of IHC assays, directly, thereby improving the accuracy and reproducibility. Using engineered cell lines as quality control material to assess the performance of IHC assays eliminates the variability associated with patient-derived reference standards.
This APP can be used for quality control of PD-L1 strong positive, intermediate positive, weak positive and negative cell line material to ensure that each cell line block complies with the expected PD-L1 expression before the material is used as reference standard for IHC assays. The APP quantifies the PD-L1 expression in each cell line core and relates this expression to a known reference value for each cell line expression level.