Craigie, R., Arndt-Jovin, D. J., & Mizuuchi, K. (1985). A defined system for the DNA strand-transfer reaction at the initiation of bacteriophage Mu transposition: Protein and DNA substrate requirements. Proceedings of the National Academy of Sciences of the United States of America, 82(22), 7570-7574. doi:10.1073/pnas.82.22.7570.