The National Institute of Environmental Health Sciences awarded a purchase order to Promega Corporation for $47,768.65 on September 25, 2026, for assay reagents supporting Complement-ARIE mechanistic toxicology research conducted jointly by NCATS and NIEHS to develop new approach methodologies for modeling toxicity-induced human liver injury. Performance occurs in Durham, North Carolina. The order comprises specified luminescent and fluorescence-based assays in firm-fixed-price pricing, including CellTiter-Glo Luminescent Cell Viability, LDH-Glo Cytotoxicity Assay, Triglyceride-Glo Assay, ROS-Glo H2O2 Assay, Lactate-Glo Assay, P450-Glo CYP3A4 Assay with Luciferin-IPA, and GSH-Glo Glutathione Assay for use in three-dimensional microphysiological systems. Ultimate completion is September 24, 2027. The solicitation was posted September 16, 2026, with quotations due September 21, 2026, and contemplated sole-source award to Promega while remaining open to all responsible offerors.