The assay aims to identify small molecule probes that can selectively kill cancer cells with mutations in the tumor suppressor gene p53. H1299 lung cancer cell lines, one with a temperature sensitive p53 mutant and the other with a p53 null mutation, were used for screening. The small molecules that selectively targeted mutant p53-containing cancer cells were identified using a cytotoxicity assay based on ATP measurements. Concentration-responses were determined using the cell lines and temperature conditions mentioned above. Is the molecule effective to this assay?