Format The Red-500 Fluorescent Size Standard is a fluorescent labeled ultra-accurate size standard for the reproducible sizing of fragment analysis peaks on any ABI Genetic Analyzer with a five-dye spectral calibration. Compatibility The size standard can be used for a variety of applications like Microsatellites, MLPA, Fragment Length analysis, Fragment Length Polymorphisms etc. Each of the DNA fragments is labeled with a ROX fluorophore resulting in a sharp red peak under denaturing conditions.