Recombinant DNA involves creating DNA molecules from different sources. Researchers improved fluorescent probes used to detect reactive oxygen species by replacing hydrogen with deuterium in the dyes. This increased the dyes' stability, shelf life, and ability to detect smaller concentrations of reactive oxygen species. Fluoromodules are fluorescent probes that monitor biological activities of individual proteins in real time. Researchers enhanced fluoromodule technology, creating probes that glow brighter than typical fluorescent proteins and allow proteins to be followed in real time. Fluorescent probes are essential for studying diseases like cancer and atherosclerosis as they detect and measure reactive oxygen species, which play a role in disease processes.