Researchers from the Universitat Autònoma de Barcelona (UAB) have published an analysis that reveals new functions of the RAD21L protein—a germline-specific cohesin—crucial for male fertility. The study, carried out in mice and in collaboration with the Spanish National Research Council (CSIC), the University of Salamanca, and the National Center for Genomic Analysis (CNAG) of Barcelona, is published in the journal Science Advances.