Chemical probes are powerful reagents with increasing impacts on biomedical research. However, probes of poor quality or that are used incorrectly generate misleading results. To help address these shortcomings, we will create a community-driven wiki resource to improve quality and convey current best practice.

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Background: SMYD2 is a methyltransferase whose role in cancer is poorly understood and is lacking cell-active chemical tools.Results: We describe LLY-507, a small molecule inhibitor of SMYD2.Conclusion: LLY-507 is potent, selective, cell-active, and binds SMYD2 in a high resolution co-crystal.Significance: LLY-507 is a first-in-class cell-potent chemical probe that will be valuable in dissecting SMYD2 biology.