The AlphaScreen® SureFire® p-MKK3 (Ser207) assay is a sandwich immunoassay for quantitative detection of phospho-MKK3 (phosphorylated on Ser207) in cellular lysates using Alpha Technology. Please note that an AlphaScreen Protein A kit, which contains the Alpha Beads necessary to run this assay, needs to be purchased separately in addition to the AlphaScreen SureFire kit.