Description
Posibeads™ provide a unique positive control to confirm specific binding and fluorescence of your antibody conjugate of interest. Posibeads™ behave like cells in suspension, and can be carried through immunostaining and wash steps following the same procedure as your cell-based samples. The 5 nm non-fluorescent polystyrene beads are coated with Whitlow/218 linker peptide. When incubated in the presence of a fluorescent antibody conjugate targeting Whitlow/218 linker, the antibody will bind to the beads and result in increased fluorescence relative to unlabeled beads.