TY - RPRT TI - U2 snRNP recognizes the branch site through a loaded-spring strand-invasion mechanism AU - Pokorna, P. AU - Pena, V. AU - Magistrato, A. PY - 2025 DO - 10.1101/2025.10.31.685824 UR - https://www.biorxiv.org/content/10.1101/2025.10.31.685824v1 ID - 10.1101/2025.10.31.685824 ER -