Testing beta amyloid binding to cells expressing the components of the B-Cell Receptor. To do this, we are going to treat cells with a saturating concentration of biotin-conjugated beta amyloid. Subsequently, we are going to treat with AlexaFluor 594 conjugated streptavidin. If beta-amyloid binds to the receptor, streptavidin can bind biotin and be detected via flow cytometry. We are controlling for eBFP bleed through into the red channel, background beta-amyloid binding and background streptavidin binding.