Cardiomyocytes tested with 490 BioTech’s LiveLight™ Toxicity Assay Kit continuously reporting changes in metabolic activity over a 40-hour period. The easily identified autobioluminescent signal reveals when effects occur, how long they last, and if they are permanent. Non-destructive autobioluminescence allows the 5 samples in this example to replace 12,000 samples using older luciferin-requiring bioluminescent technologies.