The Iberian cryoEM BAG is a large consortium (~40 groups) composed of Portuguese and Spanish laboratories working in biologically relevant problems including disease related metabolic enzymes, antibiotic resistance, DNA replication and DNA maintenance, protein synthesis, virus structure and its replication/transcription mechanisms, and macromolecular complexes involved in the control of key cellular processes like protein folding and degradation. For these research groups electron cryomicroscopy is a fundamental tool and access to ESRF facilities is essential to achieve their objectives.