The document outlines steps to identify inhibitors of REL1 through radioactive labelling assays. Several potential inhibitor sets were identified, including two batches of NCI compounds. Batch 1 compounds #117079 and #125908 showed variable but substantial inhibition at 10uM, and over 99% and 95% inhibition respectively at 100uM. Batch 2 compounds #45609, #162535 and #1698 showed over 95%, 95% and 80% inhibition at 10uM respectively. Further work included completing assays, screening additional concentrations, determining IC50 values for top inhibitors, and evaluating other inhibitor sets and growth effects.