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Table 2 Table of IC50 values for each parental and RR cell line up to 144 h post-exposure to radiation. If no value is recorded this indicates that a reduction in proliferation by 50% at that time point had not occurred; MCF-7 and MDA-MB-231 cell lines were evaluated up to 120 h post radiation whereas ZR-751 cell line was evaluated up to 144 h post radiation

From: Development and characterisation of acquired radioresistant breast cancer cell lines

Time Post Radiation (h) MCF-7 MCF-7 RR ZR-75-1 ZR-75-1 RR MDA-MB-231 MDA-MB-231 RR
72 4.98 9.64
96 3.27 5.36 3.53 9.71
120 3.74 5.22 3.13 7.11
144 N/A N/A 4.38 6.91 N/A N/A