On 7 and 8 December 2015, two dozen experts on segmentation of EM maps and electron tomograms, on ontologies and on EM-data archiving met at Madingley Hall near Cambridge for an expert workshop on “3D Segmentations and Transformations - Building Bridges Between Cellular and Molecular Structural Biology”. The workshop was organised as part of PDBe's Mol2Cell project (which also includes the new EMPIAR archive ).

Topics of discussion included the new EMDB-SFF (Segmentation File Format), the use of ontologies to annotate segmentations (a.k.a., "regions of interest" or ROIs), what a Segmentation Annotation Tool could look like, and a format to store transformations relating sub-tomogram averages to full tomograms. The meeting, which was funded by the Mol2Cell grant from MRC and BBSRC (grant MR/L007835/1) and the EU BioMedBridges project (grant 284209), was very productive.