One of the most interesting aspects of real-time PCR based on detection of fluorophoric-labeled oligonucleotides, such as Hydrolysis probes, and Molecular Beacons, is the possibility of being able to detect conveniently multiple targets in the same PCR reaction (multiplex PCR). Ideally, a real-time multiplex PCR should be able to detect, differentiate, and provide a quantitative result for many different targets without a single target influencing the detection of one of the others (cross-talk) and without loss of sensitivity. It is evident that due to the limited number of fluorophoric labels available and the significant overlap in their emission spectra, quantification of multiplex reaction products is difficult and often not possible for more than two targets. more