ACKNOWLEDGEMENTS
CASP depends on major contributions from the experimental community in providing targets, the work of assessors and their teams, and the participants who submit computed structures. We are grateful to 48 experimental groups from 14 countries who provided targets for CASP15. We thank the assessment teams of Dan Rigden (tertiary structure), Ezgi Karaca (protein assemblies), Gabriel Studer (accuracy estimation), Rhiju Das (RNA structure) and Pat Walters (protein-ligand complexes). We are also grateful to Marc Lensink and Shoshana Wodak for the CAPRI assessment of protein assemblies and Eric Westhof for the RNA Puzzles assessment work. Within out the willingness of the 89 research groups who submitted computed structures, there could be no CASP. We thank Arne Elofsson and Claudio Mirabello for providing standard AlphaFold2 results. The Center for CASP at UC Davis is supported by a grant from the US National Institute of General Medical Sciences (NIGMS/ NIH), R01GM100482 to KF.