JACS Select article by Edith Sim and Angie Russell’s group (first author graduate student Nicola Laurieri)  and funded by Cancer Research UK, has been selected by the editors of the Journal of the American Chemical Society for the latest issue of JACS Select and is also featured in an editorial. The paper describes the development of a family of molecules that change colour specifically in the presence of a breast cancer biomarker as a result of a proton transfer. More