A novel customizable OpenGUS immunoassay that detects analytes quickly and effectively has been developed by scientists from Science Tokyo. With specially designed β-glucuronidase (GUS) probes and optimized reaction conditions, this platform provides a hassle-free yet extremely sensitive approach for detecting relevant biomarkers, allergens, or other biomolecules. This makes homogenous immunoassays more widely available for point-of-care diagnostics, high-throughput testing, environmental monitoring, and food safety analysis, even when sophisticated laboratories are unavailable.