Cytosections for Antibody Screening AMS Biotechnology (AMSBIO) has launched a comprehensive range of cytosections that offer a verified, reproducible, and renewable source of positive/negative controls where the expression of the target biomarker is confirmed for accuracy and specificity by an immunoassay. Researchers, antibody and assay developers, and immunohistochemistry (IHC) labs often have difficulty finding a reliable and verified source of positive/negative controls for their IHC experiments. AMSBIO's new cytosections range consists of high-quality FFPE sections of cell pellets of overexpressing targeted biomarkers. The expression of target biomarkers in these cytosections is carefully verified for accuracy and specificity using Western blot. Positive controls (cells transfected with the target protein) and negative controls (mock transfected cells) are available for genome-wide human and mouse genome targets. In addition to its standard range, AMSBIO also offers a custom cytosections service where cell-pellet composition and density can be designed according to the customer's needs.