This proposal clusters crystallography and bioSAXS projects at the EMBL Grenoble, IBS-CIBB and IAB. It combines groups working on different topics with a major focus on cell signaling proteins, drug discovery, long non-coding RNAs, nucleic acid-protein complexes, and host-pathogen interactions. The proposers have long-standing experience in the use, as well as the development of beam lines for macromolecular crystallography and biological small angle X-ray scattering and have participated in successive BAG applications over the years, mostly at the ESRF but also at other synchrotrons (i.e. Soleil, Petra III, and Diamond). As Stephen Cusack (former head of EMBL Grenoble) will be retiring at the end of 2023 we propose to change the BAG responsible to Andrew McCarthy for this application round.