Multiplex Real-Time PCR can be applied to relative quantification experiments where the gene of interest and reference gene are co-amplified in the same reaction. Multiplex Real-Time PCR can also be used for allelic discrimination assays, where two differentially labeled probes detect two alleles of a single nucleotide polymorphism. Another application of multiplex Real-Time PCR is pathogen detection, where multiple pathogens can be detected in one reaction.