How RAG1/2 evolved from ancestral transposases to initiate V(D)J recombination without transposition - Xuemin Chen; Liangrui Yao; Wenwen Li; Shanshan Ma; Xingyun Yuan; Yang Yang; Yuan Yuan; Yumei Liu; Lan Liu; Huaibin Wang; Martin Gellert; Wei Yang (Proceedings of the National Academy of Sciences, 2025)