Multiplex assays, using either R-PLEX antibody sets or a combination of R-PLEX and U-PLEX antibody sets, require the purchase of a U-PLEX Development Pack. The Development Pack includes the U-PLEX multiplex plate, Linkers, Stop Solution, and Read Buffer needed for the assay. Assay/antibody Diluents and Wash Buffer must be purchased separately. For more information refer to the Components and Additional Components section of the U-PLEX Development Pack product insert.