 The cellular responses to such perturbations are analyzed in order to identify molecular events in the biological processes addressed and understand biological principles.We propose the Minimum Information About a Cellular Assay (MIACA) for reporting a cellular assay, and CA-OM, the modular cellular assay object model, to facilitate exchange of data and accompanying information, and to compare and integrate data that originate from different, albeit complementary approaches, and to elucidate higher order principles.Documents describing MIACA are available and provide further information as well as the checklist of terms that should be reported.