Use KeyTec® Luminescent 3D Cell Viability Detection kit to detect 3D cell viability of Hela cell line. The results showed a linear relationship between the luminescent signal and the number of cells (5 - 200,000 cells/well). Hela cells, cultured in RPMI 1640 medium with 10% FBS, were serially diluted two-fold, starting from 200,000 cells per well in a 96-well plate. Perform the assay according to the procedure outlined in Section 5.“Assay Procedure”. Ten minutes after adding the reagent, measure the luminescent signal using the Envision's Luminescence program. (Example program details include Mirror: Luminescence, Em filter: Luminescence 700, Measurement height: 6.5 mm, and Measurement time: 1 s).