xMAP (Multi-Analyte Profiling) technology is a multiplex assay format, patented by Luminex Corporation, using a panel of microspheres internally doped with two fluorescent dyes to produce up to 100 different bead identities that can be used in various applications - from HLA genotyping by oligonucleotide probe hybridization to serological profiling e.g. antibody diversity profiling, antibody identification or histocompatibility screen etc